Earlier quoted context omitted.
The "Killer App" for a cryptocurrency would be the ability to use it as a currency.
imo this is less of a technical issue and more of a regulatory one in 2024. Sending and receiving large amounts of btc/eth for instance might take a minute. For lower value point of sale transactions you don't really have to wait. And that's money in your pocket at that point not an IOU like a pending transaction at a US bank. Paying capital gains on transactions and constantly changing value dampens adoption quite a…
That's at least two decimal orders of magnitude away from being a global payment solution. It's a joke.