Position sizing is one of those concepts that sounds boring until you blow up a large portion of your net worth because you didn't have one.
It isn't about picking coins. It's about how much money goes into each position, and keeping any single position from doing permanent damage if it goes wrong. In crypto, where 80% drawdowns have happened repeatedly, sizing frameworks get a lot of attention. This guide explains how the common ones work.
Start With Your Total Crypto Allocation
Risk-based frameworks usually start one level up: how much of a person's overall financial picture is in crypto at all.
There's no universal right answer. The table below shows how one commonly cited framework buckets it. The ranges are illustrative, not a recommendation:
| Risk Tolerance | Crypto as % of Net Worth |
|---|---|
| Conservative | 1–5% |
| Moderate | 5–15% |
| Aggressive | 15–25% |
| High conviction | 25%+ (with eyes open) |
In this kind of framework, "high conviction" assumes someone understands the asset, has a long time horizon, and is prepared to see that allocation drop 70% without making panic decisions.
The test these frameworks apply: if losing the entire crypto allocation would derail rent, an emergency fund, or a retirement timeline, the allocation is larger than the framework allows, or spending money and investment capital haven't been separated.
A principle most frameworks share: money in a highly volatile asset should be money whose total loss wouldn't change your life.
Sizing Across Multiple Assets
Once the total crypto budget is set, frameworks split it across individual assets. Two common approaches:
The Concentrated Approach (2-4 Assets)
The majority of the crypto allocation goes into 2-4 assets. A typical illustration:
- 50-60% in a large-cap base (BTC, ETH)
- 30-40% in 2-3 specific altcoins the holder has researched
- Small satellite positions (5-10%) in more speculative names
Pros: Simple to manage. Forces real conviction. Fewer positions means you actually track each one properly. Cons: Less diversification. If your altcoin thesis is wrong, it hurts.
The Tiered Approach (5-10 Assets)
Tier 1 (largest positions): BTC, ETH, or other large-caps — your "stable" base in a volatile asset class. Tier 2 (mid-size): assets the holder has researched and has a specific thesis for. Tier 3 (smaller): more speculative, earlier-stage, or higher-risk positions, sized smaller to match.
Sizing each tier: Tier 1 positions might be 20-30% of your crypto allocation. Tier 2 might be 5-15% each. Tier 3 positions are typically 1-5% — small enough that if they go to zero, you shrug.
Pros: Spreads risk. Still allows for big movers to matter. Cons: More complex to manage. Risk of spreading conviction too thin.
The Maximum Single-Position Rule
Many frameworks include a cap along these lines: no single altcoin position is large enough that it going to zero would cause material damage.
What counts as "materially damage"? If a complete wipeout of that position would:
- Significantly affect your retirement outlook
- Require you to delay major life plans
- Create real financial stress
...the framework treats it as too big.
A coin can go to zero. Projects fail. Teams exit. Regulations change overnight. The idea is a portfolio where a bad outcome is painful financially but not life-changing.
Frameworks that put numbers on this often land on individual altcoin positions in the 2-10% range of the crypto allocation, with the crypto allocation itself a limited share of net worth.
Don't Ignore Correlation
One of the least appreciated risks in crypto portfolios: everything is correlated.
When the crypto market crashes, it crashes across the board. XRP, HBAR, XLM, BTC — they all go down together, often simultaneously and severely. Owning 10 different crypto assets does not give you the same kind of diversification that owning 10 different stocks in different industries does.
This means:
- Your crypto "diversification" protects against a single project failing, not against a market-wide bear.
- True portfolio diversification has to happen outside of crypto, not just within it.
- When sizing your total crypto allocation against your net worth, treat the whole thing as one correlated position.
Sizing Around Conviction, Not Just Risk
Many frameworks also tie position size to the depth of research behind it, not just to risk.
In these frameworks, an asset someone has studied in depth (its use case, token economics, and risks) can carry a larger weight than something they heard about on social media three days ago, which would sit in the small speculative tier, if anywhere.
The idea is matching position size to the quality of the reasoning, not to your excitement level. Excitement and conviction feel the same in the moment. They're not the same thing.
Rebalancing: When to Adjust
Crypto moves fast. A position that was 10% of your portfolio can become 30% after a strong run — and 5% after a correction.
A few rebalancing approaches:
Calendar rebalancing: allocations are reviewed on a schedule (quarterly or twice a year, for example) and brought back toward targets.
Threshold rebalancing: a position is trimmed back when it exceeds a set percentage (say, 25% of the crypto allocation).
Cycle-aware rebalancing: some people reduce altcoin exposure when markets look late-cycle, shifting toward larger caps or stablecoins. Because cycle phases are hard to identify in real time, this is the least mechanical of the three.
Rebalancing turns a sizing rule into a routine, so decisions don't depend on how a position feels that week. When something runs 5x and becomes an outsized share of a portfolio, a rebalancing rule is what decides whether it gets trimmed.
The "Sleep Test"
There's a simple, underrated sanity check for position sizing: if your portfolio dropped 50% tomorrow, could you sleep? Could you go about your normal week?
If the honest answer is no (checking prices every hour, unable to focus, tempted to panic sell), that's a sign the position is larger than you can comfortably hold. Sizing frameworks are partly a way to keep volatility within what you can live with.
Bottom Line
Risk-based sizing frameworks work in layers: an overall crypto allocation tied to someone's financial situation, limits on any single position, an awareness that crypto assets move together, and a rebalancing rule that keeps the plan from drifting.
The specific numbers vary from person to person and are worth working through with a qualified financial professional. The underlying idea is consistent: no single position should be able to do damage you can't recover from.
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