the difference between both years is like sky and the ground. many people says that 2017 is the year of bitcoin because the price is on top level, while in 2018 it is the reverse. the development of the price is not as rapid as in 2017 even it is not develop but going down and down. many people who were success in 2017 due to bitcoin, now some of them choose to stop and don't have intensively engage in btc.