Miners, stop selling privately.  Here is why it is not in your best interest:

-Miners typically need to sell their coin immediately as they have invested in equipment that expects a return

-There are deals for fixed liquidity privately. Where the miners can sell their coins outside the open market at a premium or at a guaranteed price range for a set period of time

-Those deals exist because there are market makers who profit immensely from pulling wool over the miners eyes

For example: the maker can buy 10,000 coins privately, which reduces the volume on the public order books. They can then “splash” the thinner books by selling 2000 coins; thereby bringing the price down. Now they can continue negotiating with miners stating that the market rate is $X - which is significantly lower than the market rate had the miners just sold on the open market. The makers are intentionally trying to keep volume off the open books so that they can keep the price low so that they can continue buying their coins low. Someone with $20,000,000 they want to invest in bitcoin would be able to acquire many more bitcoins by using the above methodology.