I've been accused of being an irrational hater of crypto, as well as a boomer, which I guess is much the same thing. That's not true. I think there is a utility to crypto, apart from (*as previously discussed) paying Tony Soprano to have one's girlfriend whacked.
A currency has two functions (some would say three, but I think the thirtd is subsumed into the 2nd)
- A medium of exchange
- A stable store of value
At its core, it allows goods and services to be traded across space and actoss time. ("I'll give you this pen now if you give me a cupcake on Tuesday/")
Note that "like stonks, crypto can only go up" not only not a necessary function of currencies, but it conflicts with requirement #2.
So, where might it be used? Where national currencies are failing. The Argentine peso, for example, arguably the Venezuelan Bolivar and Turkish lira, and previously the Zimbabwe dollar. One might even imagine that all the countries with distressed currencies use the same one, as a means of spreading risk.
However, this is unlikely to happen:
(1) Currencies don't collapse in a vacuum. Policies of the government issuing them drive them to collapse. Argentina used to be prosperous. Adopting another currency has political implications, and effectively reduce the power of the governments: they can no longer print money to fund whatever they want.
This is a criticism of the Central African Franc. it has curbed inflation, but it has prevented governments from addressing "urgent needs of society" by printing more money.
(2) There isn't enough crypto out there. The three countries I mentioned together need about 4x the total value of Bitcoin.
(3) While in theory diversification reduces risk, there's also a risk of
contagion. If one currency tanks, it might take the others with it.
(4) There are simpler alternatives. Ecuador just uses the US Dollar. Liechtenstein the Swiss Franc. San Marino uses the Euro, and so on.
So while in theory one can shore up troubled national currencies this way, it's not very practical, and most people in these countries worried about it just buy more stable currencies (when they can) to protect themselves.