Bitcoin is just similar digital gold which the supply is limited, and the circulating supply will increase only from mining that need long time and high energy cost. But fiat is very easy to increase the supply, only by printing for a second. If we compare Gold and BTC, BTC has more advantages because we can use it for cross border payment and take a few minute to comfirm, but for physical Gold hard to do.  The price action of BTC and GOLD is bit similar so in the future BTC possible to reach current marketcap of Gold, that is above $10T.