Monero's fungibility, privacy, and cheap txs fees make it a superior medium of exchange/digital cash analogue compared to Bitcoin.
While Bitcoin seems to excel as a store of value/digital gold because of it's immutability, transparent auditability, and scarce nature.
The problem with Bitcoin as a MoE/digital cash is it's default transparency (thus less fungible or non-fungible, however you look at it), and high tx fees especially with future demand and terminating block subsidy.
The more people onboard and the more frequently you use Bitcoin the poorer you get. While the opposite is true for Monero. Tx fees are already sub-1cent but get cheaper the more users there are.