Bitcoin grow fast in price when theirs a multiple investors, and if a brands like Amazon, Apple and other companies embrace to invest on bitcoin, so that is only thing that can cause a rapid increase on bitcoin, so anyone who is saying Bitcoin will reach 120k neither this year or next year, the person is exaggerating, because theirs no fact on it, many do say their views base on assumptions and at end it will  what they imagine will not come pass, the price of bitcoin is being determined by the investors, that is why most at times people do not like to speculate of bitcoin price, the price can skyrocket when you do not expect it, bitcoin price is not negotiate able, it falls unexpectedly and it rise unexpectedly