Officials from the Securities and Exchange Commission reportedly engaged in meetings on Thursday with delegates from seven firms, all vying to introduce Bitcoin (CRYPTO: BTC) exchange-traded funds (ETFs). What Happened: The SEC convened a meeting on Thursday with representatives from firms such as BlackRock Inc (NYSE:BLK) and Grayscale Investments (OTC:GBTC) to discuss their proposed Bitcoin ETFs, Reuters reported, citing public memos and two people familiar with the discussions. The SEC has established Dec. 29 as the deadline for final amendments. Issuers failing to meet this deadline will no…