They won't let you invest that much money in the first place. Investing a small amount of money will result in a small amount of profit, and he will gradually lower your vigilance. When you slowly increase the amount of money, they will put your money in their pockets, and you will not be able to find out who they are. It can only be said not to trust others very much at any time, even if that person is your friend. Protect your money, the only person you can trust is yourself.