[Gryphon Digital surged over 20% pre-market, American Bitcoin plans reverse merger for listing] BlockBeats news, on August 28, according to market data, U.S. stock pre-market crypto mining company Gryphon Digital Mining (GRYP) once surged over 20%, now up over 12%. The Trump family-backed Bitcoin mining company American Bitcoin plans a reverse merger for listing, aiming to go public on Nasdaq in September with the stock ticker ABTC.