> If it's better to hoard currency so you can buy 10% more things next year, everyone starts hoarding currency

But they don't. Not if it's things they need now, like food, or want now: electronics have been deflationary for the last 70 years or so -- when you bought the device you typed your comment on, you knew full well that a year later you would get a better one for cheaper, and yet you didn't hoard your currency. Trade in electronics doesn't seem to be grinding to a halt.

Useless crap people don't actually need? Sure, that might suffer from deflation. But ideally the world economy wouldn't be founded on useless crap that people don't actually need.

Stake: Held some Bitcoin ca. 2011-2021, just enough to buy a nice (not fancy) apartment slightly below market price. Divested now. Miniscule amounts of Monero and Tezos, basically written off.