Bitcoin prices in 2017 cannot be denied if it is so fantastic that many people get rich with this skyrocketing bitcoin price. But throughout 2018, the price of bitcoin and other crypto currencies tends to fluctuate downward. Another difference besides the price between bitcoin in 2017 and 2018 is public trust, public trust in 2017 is higher than public trust in crypto currencies in 2018. In 2018, like bitcoin, it lost its attractiveness and popularity. I can only gradually increase for the next year, bitcoin and other crypto currencies can recover so that I can get bigger profits from 2018.