The loan at their bank is required to pay monthly, if the loan only aims to buy Bitcoin for me it's not a good solution to consider.
The reason is simple.
Bitcoin can get off the notification, Bitcoin is no guarantee to profit in the month to cover the loan.
You can think of thinking of monthly money to be deposited while Bitcoin does not guarantee for bank borrowers for that.

Except: the borrower is a state apparatus, maybe it could be because they do not think of monthly deposits, directly deducted from salaries, maybe it's not a problem to borrow at a bank to buy long -term investment bitcoin.