Gold is completely impractical as money. That’s why gold coins were replaced by paper money, and banks were created.Bitcoin is a far superior form of money, as can be seen in the table below comparing their monetary properties.
The reason gold is no longer used as currency and has been replaced by fiat money is because the supply of gold is limited and that is no longer suitable for the modern economy. As the world's population and economy grow rapidly, using a currency with a finite supply like gold or bitcoin will hinder the economy, causing stagnation and preventing growth.
Additionally, under the gold standard, central banks lacked the flexibility to adjust monetary policy to help the economy cope with economic crises or shocks caused by wars, natural disasters, or pandemics.
Similarly, while bitcoin has many advantages over gold, with its small supply and limited scalability, adopting it as a currency will only shrink the global economy and hinder its growth. Neither bitcoin nor gold are suitable as currencies in the modern economy.