Cryptocurrency, without the hype or the hate

Crypto is a bet on an experimental technology and its adoption curve. It belongs in a portfolio only in amounts you're comfortable losing entirely.

What is cryptocurrency?

A cryptocurrency is a digital asset whose ownership is recorded on a distributed ledger — a blockchain — instead of by a bank or government. Bitcoin, launched in 2009, was the first successful example.

How blockchains work

A blockchain is a shared, append-only database maintained by thousands of independent computers. Cryptography and economic incentives keep the copies in sync without a central authority. Different networks use different mechanisms — proof-of-work, proof-of-stake — to decide who adds the next block.

Major categories

• Store-of-value coins (Bitcoin) — designed as scarce digital money.
• Smart-contract platforms (Ethereum, Solana) — networks for programmable applications.
• Stablecoins (USDC, USDT) — tokens pegged to a fiat currency.
• Application tokens — give access or governance rights in a specific app.
• Meme coins — social-driven tokens with no fundamental use case.

The real risks

1. Volatility — 50–80% drawdowns are historically common.
2. Regulatory uncertainty — rules are still being written in most countries.
3. Custody risk — lose your keys, lose your coins.
4. Exchange risk — centralised exchanges can fail (FTX, Mt. Gox).
5. Scams — rug pulls, fake tokens, phishing sites are widespread.

Custody and security

'Not your keys, not your coins' — assets held on an exchange are the exchange's promise, not yours. Long-term holders use hardware wallets (Ledger, Trezor) and never share seed phrases. Backups matter more than yield.

Role in a portfolio

Many educational frameworks suggest a small allocation (0–5%) if you want exposure — small enough that a total loss doesn't derail your plan, meaningful enough to matter if the thesis plays out. This is one framework among many; it's not personalised advice.