$BTC

Bithumb mistakenly distributed 620,000 BTC (worth ~$40 billion) $1

due to a "fat-finger" error. South Korean regulators cite "unjust enrichment" laws, requiring users to return funds. $RIVER

Legality hinges on whether users knowingly exploited the error. Bithumb has already recovered 99.7% of the assets.
#Bithumb