1) to give him your wallet id and password
2) to use a blockchain wallet he created for you.
3) to fund your wallet after you changed your password
4) that you will get 5000% back in a day (high percentual return in a short period of time)
Any more??? let's discuss!!!!
P.S. by the way, I have found a very good platform called gebepay and I have used it a couple of times and found it pretty useful and safe to buy products or services with my ETH, anyway have a look!
For some people it is already obvious that it is a scam. But for some beginners and gold chasers they will always try to go that way since they don't have any experiences yet.