^^ This one. 2FA, having a strong password or used a password manager so you won't get phished. Common sense, not clicking anything any link in your email or website you visited.
And with the way crypto price is going right now, there will be a lot of cyber criminals stepping up their activity so we need to be very careful at the same time and be watchful for any danger coming our way.
I think OP you should also need to visit
Beginners & Help board to learn more how to protect yourself against cyber criminals, there are tons of tips you can find on that board.