Everyone is making fake sites to earn free BTC cheap sites which just hacked after few months or week

What kind of site youre referring for?
This is not new in cryptomarket, because since before many greedy people started to create many unfamiliar things to scam people, we should be more careful always. If someone offers you an offer for investment, dont invest without proper reviews.
I think that site is cloud mining like BTCONLINE.IO, ETHONLINE.IO and other. They will ask you to deposit while you want to make withdrawal. But, they will make your account frozen and you can't get refund