It hasn't happened to me cause i don't own any crypto yet.But i am interested in what you wrote as i wanted to own cryptos. But the security of our cryptos is up to us. The other day 214 million in Etheream was "lost".In July 2017, 23 million ethereum was wiped.So there is a lot of hype regarding Bitcoin price shooting up and people are rushing in.But how safe is our crypto? How can we secure it?