Do you believe Bitcoins?

Gold vs BTC exploration!

Gold mining physically alters landscapes, while Bitcoin mining consumes vast amounts of electricity. Both mining types drive technological innovations aimed at increasing efficiency and reducing costs. Market volatility affects profitability in both gold and Bitcoin mining sectors.

Holding Fiat ?

Because the monetary supply (in circulation) is increasing.

Assuming the currency is only used nationally and the circulation (how frequently the money changes hands for the purchase of goods) remains constant. Then if the monetary supply per year for instance grows by two percent more than the growth of GDP, inflation should also be about two percent. There is simply more money competing to buy the amount of goods produced, so prices are pushed upward.