Why Allocation Matters More Than Picking a Single Coin
A crypto investor who holds only Bitcoin and one who holds Bitcoin, Ethereum, and a couple of altcoins can end up with very different outcomes even when the market moves in the same direction. The reason is not that one asset is "better" than another, but how risk is distributed within the portfolio. Diversification in crypto works differently than in traditional assets: correlation between crypto assets is high, and during stress periods the entire market falls together. But portfolio structure determines how deeply a drawdown hits your capital and how much room you have left for rebalancing.
Three Allocation Models: From Conservative to Aggressive
CoinShares, in research published in February 2026, outlined three illustrative models for allocating within an overall 5% crypto allocation in a 60/40 portfolio. These models are useful as a starting point, not a recommendation: they show the logic behind different proportions.
Model 1 — Bitcoin only
The entire crypto exposure (5% of the portfolio) goes to BTC. This is the simplest and most defensible construction from an institutional standpoint: Bitcoin is the most liquid asset, has the largest number of spot ETFs, and has the clearest regulatory trajectory. For investors who do not want to grapple with differences between blockchains, this is a rational choice.
Model 2 — Bitcoin-dominant with Ethereum
4% of the 5% goes to BTC, 1% to ETH. Ethereum adds exposure to programmable finance and tokenisation without diluting the core of the portfolio. This is a compromise between simplicity and coverage of different market segments.
Model 3 — Diversified mix
2.5% to BTC, 1.25% to ETH, and 1.25% split between Solana and XRP. This construction provides broader coverage of infrastructure and payment networks, but, as CoinShares notes, at the cost of higher volatility. CoinShares simulations from 2020 to 2025 showed that diversified crypto allocations delivered higher returns than Bitcoin-only portfolios, but with deeper drawdowns during stress periods.
| Model | BTC | ETH | Altcoins | Risk Profile |
|---|---|---|---|---|
| Bitcoin only | 100% of crypto sleeve | 0% | 0% | Lowest complexity, maximum dependence on one asset |
| Bitcoin + Ethereum | 80% | 20% | 0% | Balance between core and programmable finance |
| Diversified | 50% | 25% | 25% | Broader coverage, but higher volatility |
Source: CoinShares model, 2026
What Institutions Say About Allocation Size
The size of the crypto sleeve in the overall portfolio is no less important a decision than its composition. Charles Schwab, in a white paper published in April 2026, states plainly: any allocation to cryptocurrency increases portfolio volatility, and even 1% is not a "safe" share. Schwab proposes two approaches to sizing.
Return-based approach. If an investor assumes Bitcoin will return 15% annually, a conservative portfolio might hold around 1% in BTC, while an aggressive portfolio could hold up to 8.8%. For Ethereum, allocations are lower due to higher volatility: from 0.1% in a conservative portfolio to 2.5% in an aggressive one. If expected returns for Bitcoin or Ethereum fall below 10% annually, Schwab believes neither asset may justify inclusion in the portfolio—even for investors with high risk tolerance.
Risk-budgeting approach. The investor decides in advance what share of total portfolio risk they are willing to allocate to crypto. To make crypto responsible for 10% of a conservative portfolio's total risk, roughly 1.2% in BTC or 0.9% in ETH is sufficient. For moderate and aggressive portfolios, achieving a similar risk contribution requires 2.8% to 4% in BTC and 2% to 2.9% in ETH.
The Role of Stablecoins as a Liquidity Buffer
Stablecoins in a crypto portfolio serve a function similar to that of cash or short-term bonds in a traditional portfolio: they do not generate price appreciation returns, but they provide liquidity to buy dips without needing to withdraw funds to fiat and go through tax or banking procedures. The practical model cited by Pluang includes a 5% reserve in stablecoins within the crypto sleeve of the portfolio. This is not an "investment" in stablecoins, but a liquidity management tool.
Practical Takeaway
For an investor just beginning to build a crypto portfolio, a sensible sequence looks like this: first determine the maximum share of crypto in the overall portfolio (a benchmark of no more than 5% of total capital, unless this is excess capital beyond financial independence goals), then choose a model within the crypto sleeve, then set up a rebalancing mechanism. Rebalancing is not an optional element: without it, the portfolio drifts toward the asset that has grown the most, and risk concentrates exactly where the investor least expects it.
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Sources cited in this article
- CoinShares research on crypto allocation models: Building a crypto allocation: how to position bitcoin and other digital assets together
- Charles Schwab white paper on crypto investing approaches: Charles Schwab examines crypto investing approaches
- Fidelity Digital Assets on Bitcoin allocation: Getting Off Zero: Evaluating Bitcoin in 2026
- Bitwise/VettaFi survey data on advisor allocations: Crypto Advisor Allocations Hit 32% in 2025
Disclaimer: This article is for informational purposes only and does not constitute investment advice. Cryptocurrency investments carry a high level of risk, including the possible loss of principal. Past performance does not guarantee future results. Investors should consult a qualified financial adviser before making any investment decisions.