Perhaps in late 2018, new coins could stabilize. So now many people try to hold, but no one actually wants to sell coins at low prices.
Like what I do, I don't want to sell my bitcoins at a cheap price that's why I still hold it, but not all users do the same thing, some sell it when prices go up, that's why prices go down again, yeah like many users might predict prices will back up or even stable at a high price at the end of the year