What are those safety tips to prevents hackers hack your btc?
1) Make sure you don't visit random sites on a computer if you're storing your bitcoin information on there. If you are going to visit sites, then either grab a different computer to use or just move your information into a hardware wallet.
2) Don't keep your money in exchanges. Make sure you move your money into actual wallets instead. Exchanges can easily disappear with your money, and it's possible that there are security flaws behind the scenes too.
3) Just be smart with how you keep your money. If you have a lot of money in a single wallet, it may be better to keep amounts split up across multiple wallets. If you can, keep your wallets in different places too. If your money is in a place where a hacker has potential to get into, you should either move it or assume that it can be stolen.