It also depends on the responsibilities someone has. I just read again about taking out a loan to buy BTC. Honestly, if it is the year 2014, someone has little to no responsibilities, no family to feed and is at a young age and not exaggerating with the loan amount, I think it could be a risk that is worth taking. I have been reading some wild posts here in regards to financing BTC investments, like selling the wife's jewelry and stuff. But if someone decided to take out a moderate loan after crunching some numbers, knowing that if it goes wrong life would still go on quite comfortable, then why not go for it? I know people who have invested so much time into understanding BTC back at the time and if they came up with a well-considered approach to build their portfolio, loan money can be a component if someone understands the implications.
I am definitely not against loans, when it comes to business or investment projects. If someone has a prosperous plan and know how to make more money out of given, than a loan could be very effective instrument. Moreover, big estates are made with the usage of someone else`s money. It is normal situation and most of the people who are willing to achieve something take that risk.
If you want to take loan and invest in bitcoin for long term that is not bad at all if you know what you are doing and you know the halving cycles. Ideally you will be willing to take loan for bitcoin investment, in a bear bitcoin market, when the prices are lower and this investment can pay you off big time.
However, if you invested in a bull market, you will be having a hard time if the prices went down and also when that is investment is based upon the loan, it even hurts you much seeing the portfolio down.