As far as I'm concerned, it counts on how powerful or we can sat, how much profit bitcoin can bring to human being, and of course, its popularity, too. Imagine that the overwhelming majority of people are using cryptocurrencies, so how could the few or the newly born buck the trend? Or the elite take advantage of its convenience or pioneering nature to generate money, this idea will finally sink into the folks thus spread quickly. On the contrary, on condition that the coin is very volatile like stock, in transaction, it is not way convenient or lucrative as cash or money in the bank, then how could we expect a world where people adopt bitcoin willingly?