Wallet basics get explained with metaphors that are accurate and useless for decisions. Here is the practical version: what each type does, and where it fails.
Custodial wallets
The exchange balance. You have an account, they have the keys. Fails when the company fails, freezes, or restricts access - mitigated with 2FA, a withdrawal whitelist, and by not keeping everything there.
This is where the fee discount lives: a referral code gives roughly 20% off spot fees. Mine is BBBKK at https://www.binance.com/register?ref=BBBKK.
Software wallets (hot)
Keys on an internet-connected device. You control them, which means you can lose them. Fails through malware, phishing for the seed phrase, and device compromise.
Reasonable for spending-size amounts. Not for savings.
Hardware wallets (cold)
Keys on a dedicated device that signs without exposing the secret. Fails through a lost seed phrase, a counterfeit device, and social engineering that convinces you to type the phrase somewhere digital.
The correct choice for long-term holdings, and the one requiring the most setup discipline.
Three practical rules
Rule 1. Buy hardware wallets from the manufacturer, never from a marketplace.
Rule 2. Test recovery once with a small amount before trusting any wallet with savings. An untested backup is a rumour.
Rule 3. Never enter a seed phrase into anything with a screen that is not the device itself.
How this connects to the exchange question
People ask whether a referral code matters if they move to self-custody. The code applied to the trading you do on the venue - and if you trade at all, it applies. Mine is BBBKK: https://www.binance.com/register?ref=BBBKK.
Disclosure: I receive a commission if you sign up with the code above. This is not financial advice.
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