"1. You create accounts, I give you money where you deposit accs
2. I send you bets, and you bet for me
3. Also you can bet for yourself, that will be your profit"
Not that it matters because I don't trust him anyways. But if that is everything he told you, it doesn't look like he is asking you to provide him with access to the betting accounts you created. Looks like he wants to send you the money, you deposit and play with the money, and give him a cut of the winnings.
He is actually only looking for people that have or make accounts. So if you use your own account prepare to get it banned or even criminally investigated as my guess is this is some money launder bs with scammed money.
The money could also originate from stolen/hacked/carded credit cards, PayPals, and accounts of similar payment processors. Whoever considers doing this, should keep that in mind.
As the rest of my post stated, when asked who will have access to the account he didnt reply.
He doesnt take a "cut" of the winnings, he says he takes the winnings. The "sucker" may use his pick and play it as well and THIS will be his reward.