Those believer are not even aware of the inflation that makes their fiats less valuable from day to day. Crypto markets are volatile, today our assets has lost about %10; however it could be + %50 next year. If one is a long-term invester, such situation is not a problem. I believe that BTC and ETH will take the lead, and the next will be HIVE or likewise.
Even when they are aware, they don't really understand what an impact it makes. Hopefully it is 5x at the end of this year - that'd be nice :)