When someone searches for "Bitcoin stocks," they're usually after one of two things: either shares of companies in the sector (miners, exchanges), or the most direct way to get Bitcoin exposure through the stock market. And that's where the real protagonists appear: the shares of Bitcoin treasury companies, listed firms whose balance sheet is, in essence, Bitcoin. This guide explains what they are, where to buy them and what risks you take on.
What "Bitcoin stocks" are
A Bitcoin treasury is a listed company that holds most of its reserves in BTC with the intent to keep them. Buying its stock is, in practice, buying a slice of a balance sheet full of Bitcoin, with the advantage of doing so from a normal brokerage account and the quirk that the share does not track the Bitcoin price one-to-one. The four best-known are MicroStrategy (MSTR), Metaplanet (3350.T), Twenty One (XXI) and Strive (ASST).
Why treasury stocks and not an ETF
Here's the point few mention: in the EU, the retail investor cannot buy US spot Bitcoin ETFs (IBIT, FBTC and the like) because of the PRIIPs rules, which require a document (KID) those ETFs don't issue — we cover it in the guide to Bitcoin ETFs from the EU. Treasury shares, by contrast, can be bought without issue: they're ordinary shares listed on exchanges any broker gives access to. Where the ETF closes the door, the treasury stock opens it.
In exchange, the exposure is different. An ETF tracks the Bitcoin price almost passively; a treasury trades with an mNAV — a premium or discount over the Bitcoin backing each share — and usually behaves like leveraged exposure, amplifying both the rises and the falls.
The treasuries you can buy
These are the four main ones, each with its own detailed how-to-buy guide: MicroStrategy (MSTR) — the world's largest treasury, listed on Nasdaq, the most liquid and universally covered by brokers. Metaplanet (3350.T) — the Asian leader, listed on the Tokyo Stock Exchange; requires a broker with Japan access. Twenty One (XXI) — a pure treasury born in 2025, listed on Nasdaq. Strive (ASST) — backed by Vivek Ramaswamy's asset manager, listed on Nasdaq; also issues the SATA preferred. The full list, with live holdings and mNAV, is in the treasuries directory.
Where to buy them
For those listed on Nasdaq (MSTR, XXI, ASST), any broker with US market access works: Interactive Brokers, DEGIRO, Trade Republic, eToro, Trading 212, Revolut, XTB and others. For Metaplanet, listed in Tokyo, the list narrows: Interactive Brokers (the most complete for international markets) and DEGIRO are the usual routes. Availability and fees change, so confirm your broker offers the specific ticker before opening an account.
How they're taxed
How gains are taxed depends on your country of residence — in most jurisdictions, selling these shares triggers a capital-gains event. Brokers domiciled abroad often don't withhold or report automatically to your tax authority, so you may need to declare manually. Check your local rules or a tax advisor before investing.
The risks
Buying a treasury's stock is not the same as buying Bitcoin. You take on BTC's price risk, but also mNAV risk (you may pay a premium that later compresses), management-team risk and capital-structure risk (debt, dilutive raises). It's a higher-risk, higher-potential tool, not a substitute for spot Bitcoin or for savings.
How to choose
The starting point isn't "which rises most," but what you're after. To pit them against each other — Bitcoin reserve, mNAV, structure — there are the treasury comparisons (for example, MSTR vs Metaplanet) and the mNAV calculator. And if you prefer passive 1:1 exposure without the treasury factor, the alternative is European Bitcoin ETPs.
This article is education, not financial or tax advice. Bitcoin treasury stocks are highly volatile and carry the risk of loss; broker availability and fees change, verify them before trading.
