China will have the reserve currency backed by Gold.
Gold can go very high if we don't get abject social collapse, and it will rise because it is a hedge against governments. And $5k is plausible, but not higher.
But gold is not going to go up in the in between scenarios, such as the one we are in now where the dollar will become very strong and then later if we slide into abject collapse.
So gold has a very limited window of scenarios for large gains.
Whereas, crypto-currency is a nascent technology that is going to spread all over the world and become used by millions and billions of people.
You are comparing a maybe 4X gain over the next decade, to a 100X gain. Precious metals are pathetic.