You must consider only one. You can't get the details of the person you sent bitcoin. And at the address of bitcoin, their word differences will not be different. You will lose bitcoin, only in the sense of release before payment is made. You must use escrow in trading to avoid the loss. The first and the obvious is do not put all your funds, however amazing it seems, how the team promises or how much it is shaken, because it can be a trap or it can fail, do not put all your funds.