[jeroenhd]

I think the "no keys, no coins" crowd definitely has the right idea, but the existence of cryptocurrency exchanges is a sign that for many people decentralisation isn't usable enough just yet. These exchanges hold billions exactly because using these currencies just like real money isn't practical enough, or isn't the intended target of the people trading in them.

I think cryptocurrencies suffer from the fact most people seem to use them purely for speculation. I can't remember the last time I've paid by cash but I've never seen any store accept USDC or Dogecoin or anything else. Some online stores used to take cryptocurrencies but they've all stopped as far as I can tell.

Mayne this isn't true in other countries. I can imagine people in Argentina or Turkey or Venezuela using cryptocurrencies because their official currency is even less stable than your average cryptocoin and because foreign currencies often become available in limited numbers when banks struggle to contain their slipping currencies, basically sidestepping the government or the banking system. I haven't seen any evidence for it, though.