The best way to take loan for Bitcoin investment is when you are working and you take a loan and then little percentage of your salary will be taken weekly or monthly till the loan is completed, if it is done this way then there won't be any problem, and for those who wants to take this move please Don't be in a hurry make sure the interest in the loan is okay one that won't affect your finance.
What is the essence of taking loan to invest when you already have a job that you earn from, this is just a mistake you are about to make in the beginning of an investment.
surely there is nothing wrong in taken loan to front load your investment provided the person is capable or can be able to pay with his salary in due time, bitcoin investment is an individual or personal investment including that decision making is adjustable. if a person is working and decided to take loan to buy bitcoin to increase his investment or accumulation then there is nothing wrong with it provided he can pay. when it becomes a problem is when the person in question does not have a job to pay back and went ahead to take loan to invest in bitcoin and hoping to take the profit in his bitcoin investment and pay back the dept.