How Much Crypto Is Too Much? A Risk-First Framework for Sizing Crypto Exposure

Most crypto content starts with what might go up. This article starts with what can go wrong, because in my experience that's the part that decides whether people stay in the game.

Not financial advice. Cryptoassets are highly volatile and you can lose everything you put in. Nothing here is a recommendation to buy, sell or hold anything. Read the risk hub before making any financial decision.

Start with what you can afford to lose

The first question isn't "which coin?". It's "how much money could disappear completely without changing my life?". Not the amount that would hurt — the amount that genuinely wouldn't change rent, family support or your business.

That number is your ceiling. Everything else in this framework happens inside it.

Size positions so no single bet can break you

A simple structure keeps crypto exposure from taking over your finances:

• A total cap as a share of your savings, decided in advance and written down.
• Bigger, more established assets for most of whatever you hold.
• Small experimental positions — if you take any — sized so that losing all of each one is survivable and boring.

Many smaller tokens have lost most or all of their value. Concentration feels exciting on the way up and catastrophic on the way down.

Never use leverage you don't fully understand

Leverage turns a bad week into a wiped-out account. Liquidations happen automatically, often during exactly the sharp moves that would have recovered later. If you can't explain your liquidation price without looking it up, you shouldn't be using leverage.

Decide where your coins actually live

Holding crypto on an exchange means trusting that exchange. Holding it yourself means trusting your own security. Neither is risk-free:

• Exchange custody is convenient, but exchanges can freeze withdrawals, get hacked or fail.
• Self-custody removes that risk but makes you responsible for your recovery phrase. Lose it, or let someone else see it, and the funds are gone.

Whichever you choose, never share a recovery phrase — no legitimate service will ever ask for it.

Learn to spot the scams

Crypto attracts scams because transfers are fast and hard to reverse. Common red flags:

• "Guaranteed" returns or fixed monthly profits.
• Signal groups on Telegram or WhatsApp that promise winning trades for a fee.
• "Send me your crypto and I'll trade it for you."
• Pressure to act today, or to recruit friends before you can withdraw.
• Lookalike apps and websites asking you to connect a wallet.

If something promises high returns with low risk, the risk is simply hidden.

Check the rules where you live

Crypto's legal status differs from country to country, and in some places the rules for residents are restrictive or still evolving. That includes Tunisia. Find out what applies to you before you buy, hold or move crypto — and remember that exchange-control rules can matter as much as crypto-specific ones. I wrote more about the currency side in earning in foreign currency, spending in dinars.

Five questions before every purchase

1. Why am I buying this — in one sentence? If the honest answer is "because it went up", stop.
2. What would make me sell? Decide the exit before the entry, while you're calm.
3. Does this keep me inside my limits? If it pushes you over your cap, it's the wrong size.
4. Who benefits if I buy? Be suspicious of anyone who earns when you trade.
5. Could I explain this to someone I respect? If not, you probably don't understand it well enough yet.

Write your rules down — and rebalance

Rules you haven't written down are moods. Mine are short:

1. A maximum share of savings in crypto.
2. A maximum size for any single position.
3. No leverage.
4. Rebalance on a schedule, not on headlines.
5. Never invest borrowed money.

When a position grows past its limit, trim it back. When it falls, don't double down to "get even".

Learn properly before you trade

If you want to understand how markets work, structured learning beats tips from strangers. Courses on crypto and forex fundamentals and risk are available at Tunisia Money e-academy, and I publish my own reasoning — wins and losses — in the Investing & Crypto notebook. Neither is a promise of returns. The market doesn't make those.

Nothing in this article is financial, investment, tax or legal advice.