There would be an economy where only investments that return better than Bitcoin would make sense, for example: you wouldn't have the Vancouver vacant property problem, that money would go to Bitcoin instead and leave the home for someone who has an actual use for it. People also wouldn't be hoarding gold, it's value would go down and you can use it more easily in electronics.
Gold is physical, has no place as a store of value in a digital world in my opinion. You can't transfer it as easily, securing it requires people and storage, you can't divide into very small parts to trade with, etc.
Why?
And what does it even mean to hold value?
Money only has value because of the constant cash flowing in the economy. So you can buy stuff for money.
If people all their money in bitcoin there would be no economy and nothing of value you can buy, do bitcoin then still hold it's value?
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In general, gold might be more tangible and accessible than bitcoin.