thats becos FIAT based economy is 93Trillion worldwide and bitconomy is just 30Billion
in other word take case study salvador - where USD n BTC is allowed parallel to used payment of good services
see how % is in dollar or how much % in bitcoin - if u find data inform. that how rest world it works.
one culprit - store of value - everyone is HOARDING not spending.
u cannot use bitcoin without ramping
ramping fiat not part of bitcoin economy.