I mean, ok, let's consider
this article as a detailed guide for different types of wallets there's an explanation, principles of working, advantages and disadvantages but how do you actually know, which wallet will be safe? How did you choose your current wallet?
Where do you keep crypto? Have you ever been stolen?
The best way of knowing if a wallet is safe is to look at the number of users who are currently using it. Definitely you might not get at least a 100% security but the huge number of user bases tells you that particular wallet is better than the others.
Not long ago, i came across Ellipal wallet and i think it's very secured looking at its air-gapped nature which does not allow transactions to be made through any physical or network connection. To me this wallet is the most secure in the industry at the moment. You can check it out here
https://www.ellipal.com/