Maybe bitcoin or other crypto currencies can act as currency system in the future if people makes the stable price for it for that we need to acomodate bitcoin into full adoption not for the trading purpose only.
Even though decentralization has been on for the likes of gold and silver, it seems at some point it started tending towards centralization one way or the other, with the government being in control. So, I agree with the fact that this is an evolution of money from barter system that would change and disrupt the way we have been doing things in the past. However, people cannot make a stable price for bitcoin or cryptocurrencies, but when we obviously start getting to see real life usage, we can get to say that the possibility of seeing the market become more matured will be there and we might see some less volatility or some stability.
it is actually the usage around the world that would make the volatility to become less in the long run. That is what a lot of people are really not getting today.
When more people adopt bitcoins and bitcoin will become as a main stream of payment system then we can expect less volatility which may remain similar to how gold trades today. Cryptos will evaluate toward a momentary system, there could be no room of doubts in that.