The worst decision was when I entrusted my bitcoin to get involved in big investments like the traffic monsoon and earnings platform of telegram bot at the end of last year. Although I ended up losing a lot of bitcoin, but from there I learned to be more in control of my investment and start doing the real thing with my own actions like gambling and trading.
My friend also made a same mistake with investing bitcoins in a ponzi scam. He invested in few cloud mining sites which were offering high volume of return and he thought he could double his money in a very less time. But soon the site stop paying and instead of having profit, he found himself in a loss. So a lesson for all of us that dont be greedy and keep yourself save from these Ponzi schemes.
They say things that are too good to be true.
Of course they will lie to make their website look more inviting. I have been to this kind if services but they have a different way.
You will register thru them and they will try your password in every website they can to see if you are using the same.
I suggest making another account if there is registration that is needed.
That is one of the mistake I have done so I stopped doing service to those with sign ups and just stick with a job that pays with a bitcoin address or other coins. It is way safer.