Well not nobody.
https://steemit.com/bitcoin/@steemitguide/2017-top-list-of-b...
Moon or payments? Pick one.
https://bitinfocharts.com/comparison/bitcoin-transactionfees...
https://blockchain.info/charts/avg-confirmation-time?timespa...
Also this "nobody accepts BTC anymore" phenomenon is something artificially caused by the BTC devs. They could have increased the block size even to just twice the size and tried to figure out the real solution in the meantime, but instead they decided to be stubborn and kick out everyone who disagreed with them.
This is not a "proof" that the Bitcoin model itself has failed. It's just that one implementation has failed, and that's fine.
https://krebsonsecurity.com/2018/01/website-glitch-let-me-ov...
Instead of a central bank, a currency may develop a "decentralized central bank" whereby those independent entities take uncoordinated actions to keep a shared currency stable.
It's hard to say at this point. We've really only been thinking about this problem for a short while.
Kind of like how people are pretending this is like when Bitcoin first hit $1,000 and then fell back to $200x. It's just the same thing, right? It's all just volatility.
Except, that didn't involve a third of a trillion dollars of on-paper wealth being vaporized in a week across all cryptos, with tens of millions of new speculators getting smashed around the world. Slightly different than if $10 or $12 billion similarly goes missing, contained to a tiny group of people who mined it or purchased it at extremely low cost.