I would say hackers are everywhere and they can not stop running the crypto currencies because they know very it's anonymous nature is leading factor for them. They kind of get extra layer of protection. Anyway with some research they can be caught.
About the precautions . .
1. You should store your tokens and/or coins in the wallet for which you hold the private keys.
2. Obviously store these private keys in safe place and I would suggest that you should save them in the offline password manager.
3. Never ever go to link of your wallet from different websites, chats etc. Always bookmark your wallet website link.
4. Using the hardware wallet is advisable but looking at the cost you may prefer focusing on the first three points.
5. Storing the tokens on exchanger is worst idea. Hence follow the rules 1, 2 & 3.
5. Do not use public internet and I am pretty sure if you access wallets like that then you will loose your money.
That's all I know and I follow.
This one is really helpful, this rules and guidelines must be followed if you don't want hackers to ruin your account. This is to keep all your account more private and safe. I do agree, that one must store its account offline and with wallet. It is safer because you don't have to go through internet where hackers are just one click away. One should keep these in mind.