~snip
Some people hold their crypto assets on exchanges, it is very dangerous, previously many exchanges have been hacked.
I advise You should keep your crypto assets in your personal wallet because the exchange is not safe.
Throughout the small history in this market we have seen many hacks and when the shit show in MT Gox happened it was clear that storing your coins in exchanges is not the best idea as every year you hear about an exchange hack and till now over a billions dollars worth of coins are lost to hackers and then if you tally the amount of coins lost to scammers the amount will be staggering.