Bitcoin will force you to become fairly austere. When every expenditure you make, is mentally calculated to be "10x" over the coming years (in BTC terms), then it forces you to live far below your means.

Buying that nice $75K BMW sounds good, but if you instead bought a decent $10K used car and put (or kept) the rest in BTC. You would gain approx $650K in future value....maybe more.

When that sort of thinking gets integrated into all aspects of your thinking, you wind up cutting expenses massively as mindless consumption starts to look insanely expensive.