[American Bitcoin Stock Founded by Trump's Son Drops 38% Due to Lock-Up Expiry] The cryptocurrency mining company American Bitcoin Corp., co-founded by Eric Trump, son of Donald Trump, saw its stock plunge sharply on Tuesday due to the expiration of lock-up shares. Within less than 30 minutes after the market opened, the stock price plummeted over 50%, triggering multiple trading halts. As of press time, the stock closed at $2.19, down 38% from the previous trading day. The company had held a Nasdaq opening bell ceremony on September 16.