I am amazed at such decisions of people who just because someone said that the price of bitcoin will grow ready to sell their last panties to get easy money. If Your friend really did tell him that you Fool!
The cryptocurrency market is very volatile and the chance to earn here is much less than to lose. It is foolish to carry out your last money to sit and spit at the ceiling waiting for what they will turn in to 10000%.
Do not carry the last money here, and if the price of bitcoin continues to decline and last for 1-2 years Your friend will also sit and wait for the price to rise - he has no brains. Free cheese is only in a mousetrap, do not be so gullible and quit your job and sell the car if you have no guarantees!