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.
One of the most secured coins today is the cryptocurrency or the bitcoins because it is encrypted all the time every transaction we made are converted into different letters and numbers with different cases, so all of the transactions are secured. The only person who can decipher that is the other party only. That's why many people would like to use the cryptocurrency because it is secured, and also it has the fastest transaction. One thing that the hackers can be targeted is your device because most of the time when we are browsing the internet we can get a lot of virus, malware, trojan, and works can copy our files too and send into the hacker sometimes the mistake we are doing is opening links, surf into a unsecured websites, and also opening some emails that is not secured, or it has a portal that the hackers can connect into our device and now getting our information like names, pin codes, and all of the data have. Always make sure you must secure your device first.