Even if answer is yes, he shouldn't take a loan from bank to invest in bitcoin. Ideally, we should invest in bitcoin what we can afford to loose, and if you have to go into debt in order to invest that means that you can't afford it. Simply, its a bad idea.
He might just think differently, he’s a big risk-taker, and there’s nothing wrong with that. If I’m brave enough to borrow from the bank to start a business, I wouldn’t hesitate to do the same for Bitcoin, as long as I can handle the risk. Sure, it’s generally a bad idea, but some people have tried it and actually succeeded!
He doesn't plan to just buy and hold, he plans to actively margin trade, meaning he could loose everything.
I guess that doesnt matter as long as he believes in himself.