Bitcoin investment is pretty awesome but risky. And taking loans just to implement your plan in buying bitcoin is more risky as it may seems to me. However, if you are 100% sure and believe your capabilities in paying your loans whatever the results of bitcoin movement in the market, then you can probably proceed with this risky technique. I think I must called it twice risky. Because if anything went out negatively along the way, you will carry the burden of losing an assets and the burden of paying your loans monthly amortization which turned out into nothing. But, it's just a negative scenario of weighing things out if you will consider. Its still up to you to decide which is the right thing to do.