For several months, Grayscale was buying more Bitcoin than was being mined, but this trend came to a screeching a few weeks ago.
Source: https://cointelegraph.com/news/grayscale-hasnt-bought-a-single-bitcoin-in-over-3-weeks
Grayscale Hasn’t Bought A Single Bitcoin in Over 3 Weeks
July 17, 2020
CoinTelegraph