If everyone buys BTCs because it appreciates faster that your local fiat currency then let's just buy tulip bulbs.

My point is BTCs do not have value in themselves because you can't really do anything with them other than to exchange them for a real* fiat currency to realize existing value. That value isn't intrinsic to BTCs; it is simply transferred value. You did something that is value creating and your were paid in BTCs or (more likely) local fiat currency which you used to buy BTCs with the goal of ending up with a medium of exchange that you can use. You're not using BTCs to buy or upgrade your farm's machinery**.

The general appreciation of BTCs over time doesn't reflect a value as a medium of exchange. It is an absolutely terrible medium of exchange when compared to the alternatives. So what are we left with? Countries that cannot or will not accept USD$ as a direct form of payment, and illegal or at the very least, questionable value creating activities - and that's it.

*I know, I know; fiat currencies aren't real other that what your country is willing to do to protect it. Just ask Venezuela, Iraq, Libya, and now Iran.

**Venezuela for example may accept BTCs as payment for oil. The value creating activity of oil production is momentarily transferred through BTCs which are then used to buy Yuan, Rupees, and Rubles.

my 2 limited cents.