Again we saw an exchange got hacked. There would be nothing to hack there if people didn't keep their coins on exchanges! For the love of Dog (lol), don't keep your coins on exchanges, start practicing safety, this is your investment we are talking about!
This is correct. It's unsafe to keep your cryptos for a long time in an exchange because everything can happen and your money will be stolen, we should be careful of keeping our money there, the best thing is to withdraw our winning in just a few days at the maximum. Why there is some web wallet? web wallets and hardware wallets are for saving our bitcoin with a high security and exchanges are for trading not for saving our money, keep that in mind guys.