Yeah i agree on the scarcity thing, just one property of many that helps it be good money.

And platinum is better than gold at most of the things gold is good for, less reactive, more resistant to degrading, similar conductivity properties with more heat resistance. Yet platinum was never the most used form of money.

Gold had already established itself as money before platinum had a real chance. Even though platinum is more scarce than gold and has some better qualities to be money than gold, it wasnt able to overtake gold because gold was already established.

Something better than bitcoin may come along, better at being money, but it will likely not be able to compete with bitcoin's network.