scam or not

Someoneis offering to give 5k dollars for free then made a deal with me to return 60% of it to make sure im trustworthy but he needs me to open a crypto wallet so that i can get the transaction done is this safe ? He sent me a testimony of a client but im not convinced , is there a chance this could be real in the future while im working with him might he scam me in the future ? Is it just a slow bait ? I dont see any way i would lose the money if its in my crypto wallet, i can runn offf with the 5k if its real and if it is real then i can invest my money in the business he is offering, i really want to make sure this is legit please