This man lost 25000$ by leaving cryptos in an exchange.
Never go to sleep leaving your money in an exchange, always withdraw them to an account to which you have control of private keys
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Leaving your money on an exchange is the most ignorant thing you can do in the world of Cryptocurrency.
I'd say not writing down your recovery phrase/master seed might be more dangerous.
Great advice - thanks for sharing. I keep everything on my ledger blue that I can!