Five years is entirely not enough time for bitcoin adoption to spread this ubiquitously; this wouldnt even be valid for general cashlessness. And LOL, Ill take your fiat five years from now, Ill take your fiat until I breath my last breath, and spend the shit out of it. you cant completely replace cash, nor would you want to (the government, any government, would love this however.) when you do, the private citizen loses the ability to make a private transaction. when you give this up, well shit, what else is there to give up? if the government can see all capital flows, if you buy nything it doesnt agree with, you will have to explain