According to @twittername, on June 20, a notable BTC trader went long on Bitcoin (BTC) and saw unrealized gains peak at $3.2M. Despite the potential profit, the trader did not exit the position, and when BTC prices sharply declined, the position was closed with a realized loss of $17M (source: @twittername). This highlights the importance of disciplined profit-taking and risk management in volatile crypto markets, especially when trading BTC.