What immediate need can make you to take a loan for investing in bitcoin like said in the subject of a topic we discuss? So this topic is not about taking a loan for urgent purpose like for health, it is right about investing. And that's why there is a known answer: it is a bad idea by default. Even if some can get profit with such behavior model this model is not suitable for majority asking this question anyway. If you came to this topic to learn what people say about if it is good to take a loan, I'd say you shouldn't do so because you don't understand all risks and are not ready to all losses.