I swear to god, half of the problem with cryptocurrency is Americans not understanding what a functional personal banking system looks like. The big American banks just never bothered to move beyond the 1970s, and so otherwise fairly well-informed Americans in tech assume you need some sort of completely mad system like "consume the power of Spain making a distributed merkel tree full of partial hash collisions" to make bank transfers work.

in every other rich country, you just log in to your bank's web ui thing, click "SEND MONEY TO MY MUM", and then it sends it, for free, to your mum, with no risk of your mum being able to take more money, no random intermediary, no worry about if it actually gets there, no third party holding it in a non-bank cash account, no pre-authorisation, etc. you enter a bank identification number and an account number (and a name, usually, to avoid mistakes) and it just happens and it just works. in most countries this is quick, even, e.g. in the UK it's almost always < 5 seconds.

FOR FREE.

no blockchains, no multi-billion ponzi schemes, just a boring and simple service offered by every bank in the country.

making the Fed make banks just introduce free, instant bank transfers could have saved the world tens of billions of dollars and apparently tens of billions of tons of greenhouse gases.