Borrowing money from the bank to invest in crypto is essentially betting on which asset would appreciate more, a currency which suffers from inflation and has unlimited supply or an asset with storing value + utility. So yes, it would be weird not to do it.
If he's talking about some ideas about Bitcoin, then politely, here's the market for a while. He has no idea if they'll repay the loan, but we've mentioned the possibility of Bitcoin, but there's not much tension. After a while, the market will return to normal, but investors will be under a lot of pressure to repay the loan if they have some patience, then their problem will be solved from here.