~snipped~
I do not see anything wrong to use such huge amount of money to trade bitcoin but maybe we are still on the same page because he should not use such high leverage. He made big wrong moves.
I think you should see everything wrong with that. For someone who admonishes people to gamble or trade small amounts they can afford to lose, you should. I take your last sentence for it. He definitely made a wrong move, and will forever regret it. That's if he doesn't fall into depression from that loss. No matter how rich that dude wants to act he's, that amount used is too huge to toy with. It will shake him out of his stupidity.