Gold is cash. Bank notes/fiat is credit. Bitcoin is digital cash is digital gold.
And yea, if someone's willing to let you pass on some credit guaranteed to lose value, you spend it first, because why waste the actual money?
Discussion
BUT, when given the choice of what to receive, Bitcoin takes precedence. If I'm doing work for ya, knock 10% off the bill if you pay in Bitcoin -- saves me the trouble of fees, KYC, and worrying that I'm going to miss out on the next $10,000 hiccup higher while scrambling to do so.