Digital gold
Bitcoin is digital gold and is aiming for the gold market, an $8 trillion market.
It has much, much higher scarcity than physical gold. Physical gold can be found in many places on Earth, including the sea. It also is widespread throughout the universe.
Bitcoin will only ever have a maximum of 21 million coins mined by Bitcoin (BTC) miners.
Bitcoin is easily stored and transferred across borders between computers and smartphones. You need to manage your private key and keep it secret. Or you can pay a company to do it for you.
Physical gold is difficult to transport and store, usually requiring insurance. Some bury it in the ground, but what happens when you want to move it somewhere?