Borrowing money to buy mining hardware is proving to be similar to borrowing money to buy Bitcoin directly. You will get wrecked when, not if, a dip happens. So, don't borrow money to buy either. Instead, only buy either out of your savings.

In a world where interest rates are artificially kept low by nation-states, you will not be able to properly gauge the risk of borrowing money; the required information is exclusively sent through interest rates and those are all buggered up.