The trader known as "0xa523" has closed his positions in $ASTER, securing a profit of $435,000. Following this, he has shifted his strategy to shorting Bitcoin, with a significant position of 684.6 BTC valued at approximately $77.15 million. The liquidation price for this position is set at $113,922.55 per Bitcoin. The market is now watching to see if "0xa523" will succeed in this new venture or face liquidation.