According to Ember's monitoring, James Fickel, a long-term bull of the ETH/BTC exchange rate, began to reduce his long position in the ETH/BTC exchange rate by selling 10,000 ETH in exchange for 425.75 WBTC to repay the loan in the past 5 hours.
He borrowed WBTC from Aave from January to July this year and sold it for ETH to go long on the ETH/BTC exchange rate. His ETH/BTC exchange rate cost was around 0.054.
After partially reducing his position today, his long position in the ETH/BTC exchange rate is still very large: there is still a loan of 2438.5 WBTC (worth about $148 million).