Don't ever put your funds in any exchangers without verifying how genuine they are. There are many risk out there that you should not get involved now try to do a deep research before attempting to put in funds in any where.
Maybe he needs to determine how much money to trade, so he doesn't use all of his money from his bank account to invest or trade in the cryptocurrency. That will prevent him from losing big money in the cryptocurrency because the crypto market is too volatile, and he cannot always get a profit. Make deep research is a must thing that he needs to do before he buys any coins so he can predict or get the good price to buy and sell.