Crypto 101: never let anyone have your private key. No-one who religiously followed that rule has ever had their crypto stolen.
Coins go missing from exchanges, which break the basic private key rule. People use exchanges for convenience because as clever as cryptocurrency is, it has no answer to the exchange problem.
Coins go missing from exchanges, which break the basic private key rule. People use exchanges for convenience because as clever as cryptocurrency is, it has no answer to the exchange problem.