why i have to trust this site, seems like another ponzi 
Maybe, but like most ponzi's they payout to a point. Trick is to get in early enough to get your ROI back and then some.
but its too late bro, site if paying more then 1.5 years and also halving is near, so there is big chance that they will become scam, before you can get ROI. You must think twice before make investment