He said he would give me 0.2 BTC if I helped him


He sent me 0.88 BTC in advance, on the website of the website: https://crypto-trader24.com/#
TX: https://www.blockchain.com/en/btc/tx/b7feaa3b6e6a754a858394acb4b4dab8c4eba5f1880d61dcf5f1f0c6a58a1f58
I then see that the balance displayed on the system of the crypto-trader24 website is 0.88 BTC
But I cannot withdraw money and trade because the account has not been activated yet

I have contacted support, he loves to recharge the system at least 0.02 BTC or 0.7 ETH to activate the account

I think this amount is really too big, almost $ 200 to activate the account. And why did he send me 0.88 BTC, he could not withdraw the money, he could withdraw the address for my blockchain, because he uploaded 1.34 BTC, why his account is not activated ?
It seems that this is a new, sophisticated and professional scam. New people cannot understand these issues well. Please stay away from it. Nobody gives us anything, try to work.