In January 2024 the SEC finally approved the first U.S. spot Bitcoin ETFs — ending nearly a decade of regulatory deadlock. The biggest loser of that decision: Grayscale Bitcoin Trust (GBTC), which had spent ten years as the only exchange-listed Bitcoin vehicle and charged investors a juicy 2 percent annual management fee for the privilege. The biggest winner: iShares Bitcoin Trust (IBIT) by BlackRock, which became the largest spot Bitcoin ETF in the world in under 24 months. This guide compares GBTC against the new spot ETFs across every dimension that matters — history, structure, fees, volume, risk — and shows what the shift means concretely for European retail investors, especially in Germany, Austria and Switzerland. Status: Q1 2026.

1. History — from closed-end trust to mainstream ETF

The Grayscale Bitcoin Trust was created in September 2013 as the Bitcoin Investment Trust, long before Bitcoin was a Wall Street fixture. It started as a private investment vehicle restricted to accredited investors, with a $25,000 minimum. Only in 2015 did the trust become publicly tradable on the OTC Markets platform under the ticker GBTC — a watershed moment, because for the first time U.S. retail investors could get Bitcoin exposure inside a regular brokerage account, without dealing with wallets, private keys or crypto exchanges.

For more than ten years GBTC was practically without competition. A 2016 application by the Winklevoss twins for a true Bitcoin ETF was rejected by the SEC in 2017, and dozens of follow-up applications met the same fate — the standard reasoning being that the Bitcoin market was insufficiently regulated and prone to manipulation. GBTC thrived in that gap: at its 2021 peak the trust managed over $30 billion in assets, charging a 2 percent annual management fee — an extraordinarily profitable cash cow for Grayscale and parent Digital Currency Group.

The turning point came in 2022, when Grayscale sued the SEC after yet another conversion application was rejected. In August 2023 the U.S. Court of Appeals for the D.C. Circuit ruled in Grayscale’s favor — declaring the SEC had acted arbitrarily by approving Bitcoin futures ETFs while rejecting spot products built on the same underlying spot market. The SEC capitulated. On January 10, 2024, eleven spot Bitcoin ETFs were approved simultaneously, with GBTC itself converted into the twelfth. Day one of trading was January 11, 2024 — the most consequential day for crypto since the Bitcoin whitepaper.

2. How a Bitcoin ETF technically works

A spot Bitcoin ETF is legally a U.S. investment trust that holds physical Bitcoin as its sole asset. The mechanics look simple: each ETF share corresponds to a fixed fraction of a Bitcoin (one IBIT share equals roughly 0.000565 BTC at launch). When the Bitcoin spot price rises, the ETF NAV rises. The interesting part, though, is the creation and redemption process.

So-called authorized participants (APs) — major banks and institutional market makers like Jane Street, JPM and Cantor Fitzgerald — can create or redeem ETF shares directly with the issuer at the close of every trading day. Settlement is in cash (the so-called cash-create mechanism), which the issuer then uses to buy actual Bitcoin on regulated crypto exchanges like Coinbase. This cash-create model is what distinguishes U.S. Bitcoin ETFs from many European ETPs that use in-kind transfers of actual Bitcoin. If the underlying ETF creation/redemption mechanic is unfamiliar, read first how ETFs really work — the spot Bitcoin model is just a special case of the same machinery.

Custody of the underlying Bitcoin is concentrated almost entirely at Coinbase Custody Trust. 8 of the 12 U.S. spot ETFs use Coinbase as custodian, including IBIT, FBTC and BITB. Fidelity is the sole large exception — FBTC uses its in-house Fidelity Digital Assets custody. Eight competitors relying on a single custodian is a widely discussed concentration risk in the industry.

One important nuance to grasp: as the ETF investor, you do not own Bitcoin directly. You own a share of a trust that owns Bitcoin. That has upsides (no wallet, normal brokerage account, capital gains tax treatment) and downsides (no self-custody, no “not your keys, not your coins” sovereignty, complete dependence on the custodian). Anyone ideologically attached to self-custody will not be happy with an ETF wrapper. Anyone who treats Bitcoin purely as a portfolio allocation loves the wrapper.

3. The GBTC premium/discount story

Until January 2024 GBTC was not a regular ETF but a closed-end trust — a peculiar structure without the continuous creation-and-redemption process used by ETFs. New units could be issued, but never redeemed. That had a strange consequence: the market price of GBTC routinely decoupled from the NAV, meaning the actual Bitcoin held by the trust.

In bull markets GBTC traded at huge premiums. In May 2017 the premium hit plus 132 percent — investors paid more than double the underlying Bitcoin value, because GBTC was the only exchange-listed access for many account types. In December 2020, near the bull-run peak, the premium was still around 40 percent. Hedge funds like Three Arrows Capital actively played the premium: they borrowed Bitcoin from BlockFi or Genesis, exchanged it into GBTC shares at NAV, sat through the 6-month lock-up, and then sold the unlocked GBTC shares on the open market at a premium — a “free” trade as long as the premium persisted.

By late 2020 the trade flipped. With growing competition from Canadian spot Bitcoin ETFs (Purpose Bitcoin ETF launched in February 2021) and broader acceptance of alternative vehicles, the premium evaporated — and crashed into deep negative discount territory. In December 2022 the discount peaked at roughly minus 49 percent: anyone buying GBTC was getting Bitcoin exposure for about 51 cents on the dollar of underlying Bitcoin. That sounds like a bargain, but it was a massive risk: the discount could only close if GBTC was eventually converted to an ETF. Three Arrows Capital and Genesis blew up partly because of leveraged GBTC positions during exactly this phase.

4. The new spot ETFs after conversion

On January 11, 2024 the first true U.S. spot Bitcoin ETFs went live. The market immediately revealed who was serious about competing: BlackRock and Fidelity took in hundreds of millions of dollars in inflows per day. Within the first 30 trading days net inflows topped $7 billion into the category — with simultaneous outflows from GBTC, as early holders rotated into a cheaper ETF or realized gains. Net of those outflows the sector was strongly positive from day one, but daily GBTC outflows occasionally exceeded $600 million and pressured the Bitcoin spot price temporarily.

The twelve spot ETFs differ in essentially two dimensions: issuer reputation and fee. The underlying Bitcoin allocation is identical — every share is a claim on a fraction of actual Bitcoin. The custodian is Coinbase for 8 of 12. Tracking performance varies by only a few basis points (tracking difference 0.1 to 0.3 percent annually, depending on trading spreads and custody fees).

Note: GBTC’s fee dropped from 2 percent to 1.5 percent at conversion, but it remains by far the most expensive of the serious spot Bitcoin ETFs — six times more expensive than IBIT, Fidelity or Bitwise. The reason GBTC still carries roughly $17 billion in assets is sheer inertia: many holders sit on big unrealized gains accumulated 2014 to 2020 and prefer not to trigger the capital gains tax bill that switching to IBIT or FBTC would create. Grayscale responded in July 2024 by launching the Grayscale Bitcoin Mini Trust (BTC) — a clone of GBTC at 0.15 percent TER, spun off out of GBTC tax-free for existing holders.

5. Fee comparison — what 1.25 % really costs over time

Does 1.25 percent annual fee differential sound trivial? Then run the math over ten years. Investing $10,000 in GBTC at 1.5 percent TER, assuming a 12 percent annual gross Bitcoin return, leaves you with $27,140 after ten years. The same $10,000 in IBIT at 0.25 percent TER leaves you with $30,290. Over thirty years the difference becomes brutal: $199,500 vs. $271,300. That’s $71,800 of fee leakage for the exact same Bitcoin allocation.

This is the main reason institutional investors rotated heavily out of GBTC in the first 12 months after the launch. Most of them were happy to pay the tax bill, because the ongoing fee savings recoup the one-time capital gains tax in two to three years. Retail investors with very large embedded gains run the math differently, especially if they hold GBTC inside a Roth IRA (tax-free) or are close to retirement.

6. Volume and liquidity today

Bitcoin ETFs are the most successful ETF launch in U.S. history by a wide margin. BlackRock’s IBIT crossed $50 billion in assets under management in less than 11 months — a level most ETFs need ten years to reach. Daily volume in IBIT runs at $1 to $3 billion in normal markets and over $5 billion on volatile Bitcoin days. That is more than most sector ETFs, more than every gold-miner ETF combined, more than TLT (long-duration U.S. Treasuries).

FBTC sits in second place by inflows with $14 billion AUM, GBTC is technically still in second place by AUM with $17 billion, but GBTC shrinks every month while FBTC and IBIT keep adding inflows. On current trends FBTC overtakes GBTC during 2026. Bitwise BITB has positioned itself as a low-cost alternative to the top tier (TER 0.20 percent, AUM $3.5 billion). The remaining spot ETFs play a side role but are liquid enough to be traded efficiently.

7. The European reality — why you can’t just buy IBIT

Here it gets bitter for European investors, especially in Germany, Austria and Switzerland: U.S. spot Bitcoin ETFs are practically impossible to buy from EU brokerage accounts. The reason is the EU’s PRIIPs regulation (Packaged Retail and Insurance-based Investment Products), which since 2018 requires every product distributed to EU retail investors to provide a KID (Key Information Document) in the relevant local language. U.S. ETF issuers like BlackRock, Fidelity and Bitwise have not produced PRIIPs-compliant KIDs for their U.S. ETFs — for regulatory and liability reasons, because they do not intend to actively distribute these ETFs in the EU.

Most EU retail brokers (Trade Republic, Comdirect, ING-DiBa, Flatex, DKB) therefore block buys on IBIT, FBTC, GBTC, BITB and the rest. You can see the price feed in your account, but you cannot place a buy order. Selling existing positions is usually allowed, but new positions are not. Some premium-tier brokers (Interactive Brokers, CapTrader, Lynx, certain DEGIRO accounts for professional clients) permit purchases, but only if you are classified as a professional investor (typically minimum 500,000 EUR portfolio, sufficient experience, regular trading) or if you were a customer before the PRIIPs lockdown started.

Switzerland is the exception: Swiss residents trading at PostFinance, Saxo, Swissquote and most other Swiss brokers can buy U.S. ETFs without restriction, because PRIIPs as an EU regulation has no direct effect in Switzerland. Anyone domiciled in Germany or Austria has to either go through the cumbersome professional-investor classification path, use a Swiss broker with the corresponding tax compliance overhead — or pick UCITS-eligible alternatives that are legally distributed in the EU.

8. UCITS alternatives — what European investors actually buy

True UCITS Bitcoin ETFs do not exist yet — UCITS diversification rules (the 5/10/40 rule) prohibit a single-asset product with only one underlying value. The European market instead offers ETPs (Exchange Traded Products) or ETNs (Exchange Traded Notes) on Bitcoin. Legally these are debt securities, not funds — but they are 100 percent physically backed, with actual Bitcoin held by a custodian, identical in substance to a U.S. spot ETF.

The cheapest options are the iShares Bitcoin ETP from BlackRock (0.15 percent TER, Switzerland-domiciled) and WisdomTree Physical Bitcoin (0.15 percent TER, Jersey-domiciled). Both are 100 percent physically backed by Bitcoin in cold storage — iShares via Coinbase Custody, WisdomTree via Komainu (a joint venture between Nomura, Ledger and CoinShares). Both trade on Xetra, SIX and most major European venues, accessible through Trade Republic, Scalable, Comdirect, ING and every retail broker in Germany and Austria. Performance differs from the spot Bitcoin price by only a handful of basis points — functionally equivalent to IBIT or FBTC, just inside an ETP wrapper. The current Bitcoin price for reference is on our Bitcoin live page.

9. Tax Germany — ETPs are unexpectedly favorable

Here comes a surprise: Bitcoin ETPs are taxed more favorably in Germany than Bitcoin fund ETFs — and even more favorably than a U.S. spot Bitcoin ETF would be, if you could buy one. The reason is paragraph 23 of the German Income Tax Act (EStG), which governs the disposal of “other assets”. Bitcoin itself counts as another asset, and a 100 percent physically backed ETP that gives the holder a direct delivery claim on the underlying Bitcoin is treated tax-equivalent to direct Bitcoin ownership.

The consequence: hold the Bitcoin ETP for more than 12 months, and the capital gain is tax-free. Sell after 11 months, and the gain is taxed at your personal income tax rate (between 14 and 45 percent). There is also an annual exemption of 1,000 euros (since 2024) — anything below that is exempt anyway. A standard German equity ETF, by contrast, is hit with a flat 25 percent withholding tax plus solidarity surcharge, with no holding-period privilege.

Important nuance: for the privilege to kick in, the ETP must legally embed a physical delivery claim — meaning that you, the holder, could in principle demand that the issuer ships actual Bitcoin to your wallet. The iShares Bitcoin ETP, WisdomTree, 21Shares Bitcoin Core and CoinShares Physical Bitcoin all carry that delivery claim. Pure debt notes without a delivery option (some older ETNs) do not qualify under paragraph 23 EStG and instead fall under regular capital gains tax. Check the KID; “physically backed with delivery claim” is the language to look for.

10. Tax Austria — the privilege is gone since 2022

Austria reformed its crypto taxation in 2022 in the opposite direction of Germany. Since 1 March 2022 every disposal of crypto wealth, including physically backed Bitcoin ETPs, falls under the 27.5 percent special tax rate for capital income — regardless of holding period. The old one-year speculation period for direct crypto ownership is gone. Purchases before 28 February 2021 (the so-called “old assets”) remain tax-free; everything bought later is taxable.

For Austrian investors there is therefore no tax differential between a Bitcoin ETP and a hypothetical U.S. spot Bitcoin ETF: both are taxed at the 27.5 percent KESt special rate. With Austrian-resident or Austrian-licensed brokers (Hello Bank!, Erste, BAWAG) the KESt is withheld automatically. With foreign brokers like Trade Republic or Scalable you have to declare the crypto income manually in your tax return (form E1kv, mandatory disposition).

One practical note: an Austrian investor entering Bitcoin for the first time in 2026 should pick a Vienna-listed ETP like iShares or WisdomTree as the simplest option — you receive a clean annual tax certificate and can handle the position exactly like a stock. Direct ownership on a crypto exchange (Coinbase, Bitpanda, Kraken) means significantly more tax documentation work.

11. Bottom line — what to do as a European investor in 2026

Three concrete takeaways for retail investors in Germany, Austria and Switzerland:

• GBTC is irrelevant for European investors. You can’t really buy it, and even if you could, the 1.5 percent TER is a deal-breaker against the UCITS-distributed alternatives.
• iShares Bitcoin ETP (CH1326386094) and WisdomTree Physical Bitcoin are the right tools. 0.15 percent TER, physically backed with delivery claim, 12-month tax-free holding privilege in Germany, and tradable at every retail broker in Germany and Austria.
• Bitcoin allocation as an asset class: 1 to 5 percent of the total portfolio. Anything more is speculation, anything less is symbolic. Volatility remains higher than equities (annualized 60 to 80 percent), but correlation with stocks is weaker than commonly assumed — which makes Bitcoin useful in a portfolio context, not redundant.

The structural lesson from ten years of GBTC and two years of U.S. spot ETFs: fees eat returns, always. The next crypto innovation is already shipping (spot Ethereum ETFs went live in the U.S. in July 2024, and Solana ETF applications have been pending since 2025). The most important takeaway is generalizable: when entering a new asset class, examine not just the asset itself but the wrapper — and be deeply suspicious of any product that charges meaningfully more than the market average.

Crypto will keep going mainstream over the next several years, the offering will keep diversifying, and the spread between expensive first-mover products and cheap commodity ETFs will continue to widen. Anyone thinking long-term in 2026 buys the asset, not the brand. Bitcoin is Bitcoin — in a wallet, inside a U.S. spot ETF, inside a UCITS ETP or at a Swiss broker. What differs is the annual fee and the tax treatment. On both, GBTC is the worse deal today.

Before pulling the trigger, check market sentiment via our Crypto Fear & Greed Index and the Bitcoin halving countdown. And if you also hold U.S. equities alongside Bitcoin and want to optimize the ongoing withholding tax: Irish-domiciled ETFs are the direct lever.