This is a good move for you, you asked here first before making any decision whether to invest or not. It happens that those kinds of scams have some kind of false backup where they let you see some fake transaction histories and good comments from the people you even don't if it's real. here's a golden rule for you "If it's good to be a true offer, consider it to be a scam no matter how many good comments you see". Learn from the victims and take their sincere advice especially when they prohibit you to do so.