Bitcoin is digital gold and that means it's faster. I can move it to a thousand places in seconds. He is stronger. I can pawn a hundred million dollars for three hours in Japan on a Saturday afternoon.
Considering the fact that Bitcoin is an infinitely hard commodity while gold can be produced by people with sufficient motivation, I realized that in the long run, Bitcoin is a harder commodity than gold.
The fact is that when trading gold, a trader does not carry metal with buckets from seller to buyer, but also operates with numbers in the market. In addition, today Bitcoin is mostly used as a speculative asset, while gold for many is a real storage. Undoubtedly in the future, Bitcoin will also achieve the same capabilities, but today the differences between Bitcoin and gold are significant.
Bitcoin is limited in supply while gold can still be mined and there is no finite limit. Also gold can be tempered while no one can tamper bitcoins. Also if people forget their wallet private key or anyone died in accident without telling private key to near ones, all those bitcoins should be considered to be non-existence and hence making supply more rare.