The worst action one can ever take is to borrow or take a loan for trading. It is not a good idea at all. Anything can happen in the market, where things can go wrong, truly we will have to be positive at heart, but let the truth be said. If the capital is gone, e everything comes back to point zero, and at that time the heart is troubled and when one can't payback, then the law will have to come in and take it's place. It is advisable that you invest what you can afford to lose, not what you can't afford to payback.
Except, you are very good with the market analysis, and have gotten lots of experience over the years, and even at that good traders still makes losses too. So one has to take reasonable risks.
Banks never care for your profit nor for your loss, they only care about there money with interest and if you fail to pay them back then they take whatever you have pledged.
Not everyone is good in handling wildfire of crypto trading, even expert traders fail at times. Most importantly crypto has bear seasons also that may last for months or years. How can you return loan if your investment get struck? These are some question one need to ask himself before taking such step.