I can't control myself anymore, I've lost 600,000. What should I do? I still want to play.

$BTC can never play better than the dealer. Never play contracts; it will lead you to complete loss. A pure gambling mindset may cause others to post for your money, but I hope you avoid the pitfall. People can never earn money beyond their own understanding. I've already lost 1000U after a month of playing, starting from 5x contracts, slowly moving to 75. People can never suppress their greed, unless your self-control is strong enough; otherwise, never play.