The dude is in net profit from trading, he only used a much higher leverage on that trade and somewhat got liquidated.
A rich person like him suppose not use leverage at all which is the reason he lost so much. Using millions to trade can give high ROI without using leverage but I do not know the reason he is using high leverage to trade which is just greediness and he got liquidated. If he is not careful, he may later go broke or he should just change.
This is just the big problem of most traders, they tend to use high leverage to trade even when they are using a very huge sum of money to trade, I don't really know if it's because of greed or what but they forget to understand that when using high leverage, as you were able to make a lot of money very quick, you can also lose a lot of money very quick, and upon all this experience, most lads will still not learn to use low leverage or no leverage at all, with such margin he can make a fortune by single trade, but he still went ahead to be using high leverage, I just hope that he learned his lesson from this big loss