People don't spend when they anticipate their money increasing in value. Its obvious even at this level of adoption.
Bitcoiners are stingy because "muh generational wealth."
If everyone is saving, obviously they aren't spending. Food, gas and necessities are a tiny fraction of the overall economy. Bitcoiners VASTLY underestimate the economic contraction that would occur under these conditions.
But if you dig living like the Amish, I'm sure you'll be fine.