Blackrock has to actually buy the bitcoin. They’re not going to take the risk of illegal fractional reserves with 11 other issuers being competitors. One hint that they are doing that and they’re done for. Unlike FTX, this is strictly regulated by the SEC, and yes, they will enforce it regardless of our skepticism of the SEC.
The sell off right now is due to people getting out of grayscale. People are fleeing gbtc while others are entering the other ETFs, mainly blackrock. Essentially the Bitcoin that gbtc is selling off is being bought right back by blackrock. There’s a chance that the price is going down because obviously, grayscale needs to sell theirs before black rock then buys it so there’s a lag, but there’s dozens of other factors at play as well so no one can say anything with certainty.
None of this truly matters, the price only goes up in the long term.