In my own opinion, there are some disadvantages of bitcoin. One of the example is that there are many hackers in bitcoin that can hack your account and can rob your profit when you invest money. Another thing is in other country, they treated bitcoin as illegal. There are some chances that the value of bitcoin is falling very low and many investors change into altcoin. Another disadvantage of bitcoin in students is some students don't focus on their studies but instead they focus on bitcoin which is wrong. Another is some employees change their profession and jobs to bitcoin.