Your money is safe only in your wallet and if you are trader you agree with risk that you might lose your funds. Remember that.
Hacking is actually one of the biggest threat to all those who are there in the world of crypto currency as their money is highly exposed to hackers and there are hackers which are continuously trying their best to grab all your coins. Till the time, you will not be having enough of knowledge about the things and that you will not take care of your coins well, there will always be a risk of losing of money.
I don't think so it is a big problem because the hackers can't hack the wallet without the private keys if you have your private key safely then your coins will be safe forever and you never have to store your coins in an exchange wallets where the most of hacking are happening.
Hackers can do anything which they want to do. They just need to get some backdoor in your computers using which they can steal all your credentials which may even include the private key of the wallet in which all of your crypto coins are placed.
You need to be very well aware of hackers as they can harm you in no time without even letting you know what they have done. Keep your system up-to-date and do not give them a chance to take away your money.