How Much Crypto Belongs in a Portfolio?
There is no correct percentage. There is only a loss you could absorb without changing your plans — and that is a different question, with a personal answer.
The question is badly posed
Ask how much crypto belongs in a portfolio and you will get answers ranging from zero to twenty per cent, delivered with roughly equal confidence. That range is not proof that most of those people are wrong; it is a sign that the question is under-specified. Portfolio allocation is not a search for a universally correct number. It is the process of deciding how much of a finite risk budget to spend on a given exposure, and reasonable, well-informed people spend that budget differently because their time horizons, obligations, existing holdings, and tolerance for watching a position fall are all different. A more useful question is how large a loss on this position you could absorb without changing anything else in your financial life, and without abandoning the position at the point of maximum discomfort.
Start with the volatility, not the story
Whatever you believe about the long-run case for crypto as an asset class, the short-run statistical picture is not seriously disputed. Realised volatility for the major crypto assets has typically run several times that of broad developed-market equity indices, and the drawdown record is severe: bitcoin, the largest and longest-running of them, has fallen more than seventy per cent from peak to trough on more than one occasion, while smaller tokens have routinely fallen further and some have never recovered at all. The practical consequence is arithmetic rather than philosophical. A two or three per cent position in an asset that swings four or five times as violently as everything around it contributes far more to a portfolio's total variability than its size suggests, which is why allocation here is better thought of in units of risk contributed than in units of capital committed.
- Ask what a seventy or eighty per cent fall in this position would do to your total portfolio, your plans, and your willingness to hold the rest of it.
- Size the position so that outcome is genuinely survivable and dull, rather than merely unlikely in your own estimation.
- Decide the rebalancing rule in advance, because the moments when rebalancing matters most are the moments when following it feels worst.
Position sizing is the part of investing you control completely, and the part most often decided by accident.
Diversification, rebalancing, and the honest answer
The strongest argument for a small allocation is diversification: an asset driven by different forces might add return without adding proportionate risk to the whole. The evidence is mixed, and it is weakest exactly where it matters most. Correlation between major crypto assets and equities has been unstable rather than reliably low, and it has repeatedly risen during broad risk-off episodes, with several stretches in recent years — including periods during 2026 — in which crypto and equities sold off together and correlation readings reached the high end of their historical range. A diversifier that decouples in calm markets and re-couples in panics is doing less work than a long-run average correlation implies. Rebalancing is the mechanical counterweight. Choose a target weight and a tolerance band, and when the position drifts outside the band, trim back to target or top up to target. Done consistently, that enforces selling into strength and buying into weakness without requiring anyone to forecast anything, though in taxable accounts each trim may be a disposal with tax consequences, and trading and tax costs belong in the decision rather than outside it.
The honest answer is that there is no correct number, and this article deliberately declines to prescribe one. Informed investors land anywhere from zero — an entirely defensible position, since nothing obliges anyone to hold any particular asset class — to a low single-digit percentage, and the reasoning behind the figure matters far more than the figure itself. What should be plain either way is that crypto is a high-risk asset class: prices can fall sharply, stay depressed for years, and an individual token can go to zero permanently. Tax treatment and the rules governing these assets vary by jurisdiction and change over time, so speak to a qualified professional in your own country before acting.
This article is educational and general in nature. It isn’t personalized investment, tax, or legal advice — always weigh your own circumstances, or talk to a licensed professional, before making financial decisions.