Bitcoin has already failed as a currency, and this is why it should be really seen as a digital collectible. Actually, it is worse than that: it can go away if the miners lose interest in keeping the chain around.
ETH is not meant to be a currency. It is meant to be a scarce resource like oil and its value is in its requirement to power the crypto economy that is based on the Ethereum blockchain. With ethereum, there will be plenty of people who might be in accepting payments (with stabletokens or other ERC20), but no interest whatsoever in holding ETH.
Re:Interview: Vitalik Buterin
by nuclearnice1 on Saturday September 03, 2022 @06:46AM
(#32700546)
Are stablecoins “widely accepted as a medium of exchange?”
I know some places accept Bitcoin. Tesla accepts Dogecoin for some products.
What can you buy with stablecoins?
You can pay your balance at https://communick.com with DAI.
You can pay for work and fund developer grants with DAI via https://gitcoin.co
Aside from that, if you are interested in accepting payments with crypto, checkout https://hub20.io, a self-hosted payment gateway.
I personally am interested in a currency that does price level targeting but I have my doubts that it would work with a cryptocurrency because the oracle that collects the CPI is going to be centralised.
I will admit getting the CPI right is easier than getting central bank policy right.