I don't think the decline in GBTC will have a significant effect on the market because even if it is sold by investors, what they sell is the grayscale stock itself and even if there is volatility in the crypto market it is only the speculators themselves in creating issues over the unlocking of GBTC. We all know that Grayscale has its own competitor such as ETF BTC and we know GBTC is more expensive than BTC.
This may be an opportunity.