I think the end of those sales is very far away considering that the Grayscale has accumulated a huge amount of BTC over the years and now it's time for them to profit. Apparently, only a small number of people understood that the approval of BTC ETFs will not have a positive but the exact opposite effect on the price considering the conversion that happened when it comes to Grayscale.

Looking at the bigger picture, nothing bad is happening - everyone who thinks the price is too high will have the opportunity to buy cheaper, and on the other hand, the more Grayscale sells, the better for the future. Such a concentration of BTC in the possession of only one company is always nothing but a big risk.