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Bitcoin is Stupid and Does Not Deserve an Emoji (blog post)
(thedabbler.patatas.ca)
This is a most excellent place for technology news and articles.
The swings were bigger when the market cap was smaller, this is usually the case. The market cap of the yen is much bigger still.
Turns out you're right, BTC price only went down 77% from the 2021 peak, my mistake /s