I agree with this thing, but one thing is bitcoin can be stolen by those greedy people and very oriented on stealing using internet . Any thing can be easily stealable through Internet.
if your account/wallet doesn't have a maximum security and you tend to open an unknown website and installing some software to your mobile or pc then you are more likely to get hacked. most of the hackers are using phishing or even Keylogger in order to get your account information especially your log in ID and password. and that's why there is a so called 2FA.
Absolutely right, because we are not kids and also we are doing our investment and well know which sites are risky and like a scam, so it is our first responsibility to protect our investment and than think for others. I want to say, if we avoid that scam type sites than automatically these sites can't work and also scammer know that people are greedy so that's why they are offering high profit, and also we trust on them and get lose. If in the start, we are becareful than may be no one can scam us easily.