No they will not be hacked. The only way anyone can get your funds in these wallets is if you make a mistake with your security. The algorithms that are used to secure these wallets are unbelievably secure.
that's false dude.we heard many news that many exchange walllet hacked.and also cryptocurrency wallet too.few days ago many people claims that their balance in myetherwallet stolen.
I am not going to trust these threats because it is only here to mislead the investors but actually it is not easy to hack a bitcoin wallet. Now there are many wallets but I think blockchain is a wallet which is almost impossible to hack. So use blockchain I am sure this issue will be no more there, hacking is not a big deal thanks to bitcoin wallets now ratio of bitcoin hacking is almost equal to zero.