A key aspect of money is fungibility https://www.investopedia.com/terms/m/money.asp which Bitcoin lacks due to the bifurcation of "tainted" UTXOs and "clean" UTXOs. Tainted coins can't be used on any exchanges and many merchants won't take them. Gold, cash and monero are all fungible. Every Monero UTXO has no traceable history thus mamingnit as fungible as a gold atom. Privacy is crucial for money.