How to avoid scams in BitCoin?

I've been in the cryptocurrency world almost a 1 year.
I tried various sites that offers many amazing services and activities that promised to make your investment tripled or doubled within just a small amount of time.

Also, I tried those paid to click sites (PTC) many times, up to the extent I almost neglected in my studies and focus on finding the best platform to help me grow bitcoin.

I almost plan to stop to go to school and be at home and continue clicking and browsing bitcoin sites. But l think my career path is not in the bitcoin world, I repeatedly got scammed and got false hopes.
"What just happen?" I asked myself many times, and like a loser in a casino, I continued to play and invest thinking maybe this time I will win, until I realized that I was just fooling myself. Thinking that maybe I can be one of those cryptomillionaires or someone who holds significant number of bitcoins.

I tried my best to avoid scam sites, I'd research on each site, asked some people but still got scammed.
But I can't deny the fact that some of my investments in some sites give me back my investments but it is so hard for me to be scammed many times. I want to scream and throw my laptop away because everytime I'd caught with it, it's like I getting compressed in every side.

And all those experiences, give me an idea how to avoid scammers and scam sites. Just like what my teacher in my FM
class advised to me, "Be greedy if everyone is afraid and be afraid if everyone is greedy".
Being skeptical, cautious and wise were my core foundation to this path. If you have some tips guys please share it with me, thanks!