Does Bitcoin Belong in Your Portfolio? A Fiduciary's Framework for Digital Assets

Bitcoin can have a place in some portfolios, but only as a small, deliberately sized position that the investor can afford to watch fall by more than half without changing course. A fiduciary framework treats it like any other risky, speculative asset: decide whether it fits your goals, size it so a severe loss is tolerable, choose custody carefully, set rebalancing rules in advance, and understand the tax treatment. Investors who cannot accept the possibility of losing most of the position should not own it at all.

What kind of asset is bitcoin?

Bitcoin is a digital bearer asset with a protocol-fixed supply of 21 million coins, traded globally around the clock. It produces no cash flows: no earnings, no coupons, no rents. Its price is set entirely by what the next buyer will pay, which makes traditional valuation impossible and means a wide range of long-run outcomes, including very poor ones, remains plausible.

That uncertainty is the honest starting point. The bull case rests on scarcity, growing institutional access, and adoption as a store of value. The bear case rests on the absence of cash flows, regulatory risk, technological and security risk, and the possibility that adoption stalls or reverses. A fiduciary's job is not to predict which case wins. It is to make sure a client's plan succeeds in either outcome, and we make no prediction about bitcoin's future price in this article.

How risky is bitcoin, really?

Very. The historical record is unambiguous, and anyone considering a position should internalize it before buying rather than after.

Bitcoin's price fell roughly 77 percent from peak to trough in the 2022 bear market, and earlier cycles saw declines exceeding 80 percent, according to research from Fidelity Digital Assets and public price history. Its annualized volatility has typically run three to four times that of the S&P 500. For comparison, the S&P 500 has not experienced a drawdown deeper than about 34 percent since 2008, while bitcoin has had multiple drawdowns worse than 70 percent in the same period, some taking years to recover.

Past recoveries are no assurance of future ones. An asset with no cash flows has no fundamental floor, and a permanent loss of most or all of the investment is a real possibility, not a rhetorical caveat. Bitcoin has also at times fallen alongside equities, so it cannot be relied upon as a hedge when diversification is needed most.

A sizing framework: let the worst case set the weight

Because the downside is extreme, position sizing is the primary risk control. A useful discipline is to size the position by its potential damage rather than its potential gain.

Consider a hypothetical family with a $20 million portfolio that allocates 1 percent, or $200,000, to bitcoin through an exchange-traded product. If bitcoin falls 75 percent, in line with prior cycle drawdowns, the position loses $150,000, which reduces the total portfolio by 0.75 percent. That is a tolerable outcome inside a diversified plan. The same drawdown on a 10 percent allocation would cost 7.5 percent of the family's wealth, enough to affect real goals. This example is hypothetical and is not a recommendation of any allocation.

For most clients who choose to own bitcoin at all, this logic lands in the low single digits as a maximum, and often at zero. Zero is a fully legitimate answer, particularly for investors whose plans are already funded and who have no need to take this risk. Money needed for near-term spending or core lifetime goals has no business in the position.

How should bitcoin be held? Custody matters

Custody is where digital assets differ most from traditional securities, and where unrecoverable mistakes happen.

Spot exchange-traded products.Since the SEC approved spot bitcoin ETFs in January 2024, investors can hold bitcoin exposure inside a brokerage account at a qualified custodian, with familiar statements, beneficiary designations, and estate processes. For most private clients this is the most practical route, though it carries fund expenses and depends on the ETF's own custodian arrangements.

Direct ownership with self-custody.Holding coins in a private wallet eliminates intermediary risk but concentrates everything on key management. Lost keys mean permanently lost assets, with no recourse, no fraud department, and no recovery mechanism. Self-custody also complicates estate planning badly; heirs cannot inherit what they cannot find or access.

Exchanges and platforms.Leaving meaningful balances on trading platforms adds counterparty risk. The failures of several large crypto platforms in 2022, including FTX, left customers as unsecured creditors. SIPC protection does not cover cryptocurrency held on these platforms.

What rebalancing discipline does bitcoin require?

An asset this volatile will not stay at its target weight. Without rules, a small position that surges becomes a large position by accident, and the portfolio's risk drifts upward exactly when enthusiasm peaks.

The discipline is mechanical: set a target, set bands, and act when the bands are breached. A 1 percent target might carry bands of 0.5 and 2 percent; above 2 percent, trim back to target and bank the gains, and below 0.5 percent, rebalance up only if the original thesis and risk budget still hold. Writing the rules down in advance matters, because rebalancing out of a soaring asset and into a fallen one is emotionally difficult in the moment.

This reflects the four disciplines we apply across portfolios at Atlatl Advisers: be invested, so the plan works through full cycles rather than by timing; be connected, so the position fits the overall plan and is sized within it; be diversified, so no single asset, least of all a speculative one, can compromise the family's goals; and be disciplined, so predetermined rules, not headlines, drive decisions.

How is bitcoin taxed?

The IRS treats digital assets as property, not currency, under guidance dating to IRS Notice 2014-21. Selling, exchanging one coin for another, or spending bitcoin are all taxable events, with gains long-term or short-term by holding period. Brokers now report digital asset sales to the IRS on Form 1099-DA, effective for transactions beginning in 2025.

One quirk: as of June 2026, the wash sale rule in Section 1091 does not apply to directly held cryptocurrency, because the rule covers securities and the IRS classifies crypto as property. Losses on spot bitcoin ETF shares, which are securities, can still be subject to wash sale treatment, and Congress has repeatedly proposed extending the rule to digital assets, so this asymmetry should not be treated as permanent. Estates face additional issues, since unreachable keys can leave heirs with a taxable asset they cannot recover.

Key numbers

Frequently asked questions

What is a reasonable bitcoin allocation?For investors who choose to own it at all, sizing is usually in the low single digits, set so that a 75 percent or greater decline would not affect the family's goals. Zero is an entirely defensible allocation, and the right one for many investors.

Is bitcoin a hedge against inflation or stocks?The evidence is mixed; bitcoin has at times fallen sharply alongside equities, including in 2022. It should be treated as a speculative risk asset, not a dependable hedge.

Is a bitcoin ETF safer than holding coins myself?It removes the risk of losing private keys and fits standard custody, reporting, and estate processes, in exchange for fund fees and reliance on the ETF's custodian. For most private clients it is the more practical structure.

Could bitcoin go to zero?A total or near-total loss cannot be ruled out for an asset with no cash flows and meaningful regulatory and technological risk. Any allocation should be sized with that possibility in mind.

Do wash sale rules apply to bitcoin?Not to directly held coins as of June 2026, because the IRS classifies crypto as property rather than a security, though proposals to change this recur in Congress. Spot bitcoin ETF shares are securities and can be subject to the rule.

Should I buy other cryptocurrencies too?Most other digital assets carry the risks described here plus thinner liquidity, weaker track records, and in many cases unresolved questions about their regulatory status. The fiduciary bar for those assets is higher still, and most do not clear it.