Here's my question: Would you still continue to move your fiat currency to Bitcoin if it topped out at around USD$5000 and you KNEW it would not go higher, but you also KNEW it would not dip in value? Maybe we could assume it would rise with inflation. If this were the case would you be more or less likely to move your money to Bitcoin?
The bottom line here is, it has some value right? Then definitely yes.
And besides, the role of bitcoin is not always about using it as an investment. Using it as a currency will bring advantages and comfortability on which is not present on the traditional and usual of sending and receiving money. So there will be more times that I will move some of my fiat to bitcoin in order to experienced that advantages.