Terra was a scam project. Do known just emptied the bitcoin wallet as this used to back the UST. Remember that if UST unlike another stable token which fully pegged with dollar but UST was a bit different. This is algoritmic stable token that used different mechanism. That's why the price was dumping so hard. Do known has even sold some of his bitcoin to backed this stable token. It was so garbage as fuck.
UST used to drop more than 40%, shortly after that LFG moved 28k2 bitcoin to binance to support and support UST price but this will cause a massive crash to the market. LFG is using all 3 billion USD of bitcoin accumulated previously to save UST. If it fails, Do known will be the cause of a large market crash like in 2018.