Individuals make money in cryptocurrency in different ways some make money by providing value for others in exchange for cryptocurrency some are making money by work of bounty campaign and some others making money by illegal ways. Its depend upon you. There are many way to earn money. Your friend want get in crypto? then welcome. He can get into this business but before start this business he advice let the pay his debt. Because crypto market is no predictable and isn’t sure success it’s high risk too invest. If he hasn’t enough money to invest then he can work in bounty campaign, he can earn token then it can exchanged into bitcoin. If he participate in bounties or airdrops to gain free he needs to be patient because most of the bounties are takes 5-6 months or more. Perseverance and dedication can be rewarded soon because I believe it will happen soon.