All the possible technologies that exist today to keep crypto safe is not worth anything if it is not used in the right way. Most agree that hardware wallets are safe way of keeping crypto, and for now it is shown that this is correct. But security of hardware wallet is worth nothing if user is not aware of importance to make backup of seed words, so in case device is broken or stolen coins are lost.
My opinion is that the biggest challenge is how to educate people to use the available technology in the right and safe way, which is crucial for security of their coins. When something bad happens, then it's too late.
This is exactly the problem I want to tackle and educate people on it. It's hard to find relevant guides to security in one place. There are some that offer just generic information but don't discuss the details of how to do it.