That's where it gets incredibly funny. They persuaded everyone that UST was worth $10Bn dollars and then went and bought $3Bn of BTC with the profits. At which point the obvious question is "Hey - isn't this asset by definition worth $3Bn"? And the answer is "Oh, no, by the time it drops from $10Bn to $7Bn we've burned all our collateral and it's worth 0".