Grayscale Investments has submitted a Form 8-A12B to the U.S. Securities and Exchange Commission (SEC) for its Grayscale Bitcoin Trust (GBTC), according to a report by The Block Pro. This filing is a significant step towards the conversion of GBTC into an ETF, a move that would offer a regulated investment vehicle for institutional and retail investors to gain exposure to Bitcoin without the need to directly purchase or store it. Further details and implications of this filing remain to be seen.