To all the people who are saying that this idea is insane: this is exactly what people and institutions do when they buy on margin, AKA use leverage. It's the same thing--you pay interest on someone else's money that you're using to speculate. I totally agree that for the average person, he/she should not borrow money to play around in the crypto market, and that advice is coming from someone who does not have a single credit card.
If you don't have the cash on hand to invest or you can't afford to lose it (I fucking hate repeating that advice), don't do it. Everyone in the gambling section will tell you the same thing, and trying to buy bitcoin on what you think is a dip is gambling.
Margin is a bit different though. You're not taking a loan in order to repay the full loan per-se, you're only repaying the difference in price, and 2nd, you're FORCED to repay the full difference once your funds get burned.
Taking a loan on the other hand, you're stuck with the exact amount in fiat that you need to repay. And there's no automatic liquidation, so in case there's a big red dildo up your bottom, it's going to go all the way down before you even realise what's happening (unless you're smart enough to put a stop-loss.. is it smart even?).
I can't say I haven't been burnt off funds myself because of severe fluctuations, but hey, at least I'm not in crippling debt for the rest of my life.