You can't protect Bitcoin in general but you can protect your coins. First, don't keep all coins you have in just one wallet and avoid online wallets. They are at least safe and max vulnerable to threats and hackers.
Also, definetely use hardware wallets, they are the best.
Avoid sharin your personal and wallets data with anyone and keep your details on a safe place.
Keep the hygene of your computer and mobile so new updazed version of antivirus and avoid clicking on suspicious attachments, links etc.