Monetos supply is infinite not fixed because of its tail emissions. Bitcoin has a fixed supply that is predictable and know there isn't going to be inflation.
The only reason why gold stood as the main currency of the world for a while was because it was the only portable option before the invention of fiat by the Chinese. Even then Gold still has more value than moneto as you can melt it for jewelry and parts for electronics. Bitcoin has its value from being hard money without and fears of a inflating supply and its strong security assurances.
People actually use Bitcoin for everyday spending as its my only currency I use and spend and save. I know many people use it. There's businesses that accept it for example nostr:nprofile1qqswp94gnm4epqsgjkndl4lnd8krzdj5u4mzuppdtxksdymkty63g7gpp4mhxue69uhkummn9ekx7mqpzpmhxue69uhkummnw3ezumrpdejqw3z3ce nostr:nprofile1qqsfnnh6v3dspqtnwv3e46aed5k3nypyfx2wtet92ekg9szt3hr9k4qp8pmhxue69uhkc6t8dp6xu6twvuhxyetwvd5x7erjdanxvtnrdakj7mn0wd68ycmvd9jkuap0v9cxjtmkxyhhyetvv9usz8nhwden5te0dehhxarj95crxtnydaexzenpvd6x7une9ehhyecj4jdzt and nostr:nprofile1qqs2gndun24r2utk5l20tscsdprw5zttvm0qk58w8xhl2ja2kmzt7jcpvemhxue69uhkv6tvw3jhytnwdaehgu3wwa5kuef0dec82c33x5ehsmt90q6ry7p5vd5xge3hx5mksupnwym857rpvaukk6m9dvmhqer8wa6hwepsxu6rjd35v34hj6rp89ensvnj096ns0mzwfhkzerrv9ehg0t5wf6k2qg7waehxw309ahx7um5wgkkgetk9emk2mrvdaexgetj9ehx2ap05npa2h many others accept Bitcoin for their goods. Are you going to tell them that they're hallucinating the Bitcoin they received?
There is also 2.1 quadrillion satoshis the smallest unit Bitcoin. There's more than plenty for people to use and spend, you don't have to use a whole coin to spend and save in.