there is no doubt about this that loans are too risky, because no one know know that what is going to happen to the price of bitcon either its price will increase or decrease, And by granting a large loan must take a pledge that exceeds the cost of the loan. And still need to do everything right from a legal point of view, to conclude an agreement
Its not risky if the borrower will provide you a god collateral you must check what collateral he is offering it can be risky if the collateral is altcoin because there are possibilities the price will dump.
It is not risky only in the case of a reliable collateral that does not depreciate over time.