Hello. I see different platform like nexo, blockifi, etc... that can borrow you crypto or stablecoin. I'm here to ask if you have a strategy for example you borrow btc with an interest rate of 6% and then you use it on defi with 8% APR. Thanks for helpful. 
Borrowing something that has an interest is really risky and it is not really advisable. If we are going to invest in crypto we need to study and see how it works because crypto is an investment that is risky because it is high on volatiliy.