I think it's safer to keep the money in the bank but it's more profitable to invested in the crypto currency market !
I also think that because internet was such a risky thing and it is too hard to be safe in internet. There are so many hacker on the internet and also at your wallet. We know that there are some hacker through atm machines but there are more easy to hack at the internet because when you've lost your money, then you never get it back.