Because most do not know what theyre investing in and would rather listen to the crowd. What happens then? Prices crash once youve bought into it.
After the prices falling those people were complaining in telegram groups of the projects they had invested.
Taking a loan or using all your life savings can be hugely risky, especially if you do not have the prerequisite knowledge on the tech and the coins.
That's why the best thing to do is to invest only your extra money.
Be informed. Ask the right people. Arm yourself with knowledge before jumping on the hype-wagon. This would significantly reduce your risk and most importantly, position you to invest in the long-term fundamentals of the technology.
Researching the project you are going to invest is the correct way to do before putting any money in the project.