I believe that cryptocurrency has gained its maximum popularity over the past three years. This is a very convenient system for both investors and people who, instead of paper money, use cryptocurrency to pay for something. There are enough pros, but the problem is that this is a very unstable thing, the rates of different coins are constantly experiencing ups and downs. You need to be very careful, although it was the cryptocurrency that gave many a chance to improve their lives in material terms. To make money trading coins or airdrops, you do not need a professional education or an office, you only need the Internet.