Mining has become a business and it’s growing. It has daily expenses and for that miners need to sell their BTC to cover up electricity bill and other cost if exists. But is there any known miner who has not sold their BTC for a single time who is mining for a long time now? We know there are addresses which haven’t moved their BTC for a long time. Is any miner included in the list?
I don't think there is any miner aside from Satoshi (maybe) that hasn't sold their bitcoin starting from its mining campaign up until today. What I know for sure is there are still many miners before that have held a portion of the mined bitcoin because of investment reasons. I think most miners have already sold some of their bitcoin way back for their necessities such as paying bills, rent, food, clothing, and other stuff they need and want. It wasn't really a bad decision after all because they have experienced and enjoyed the fruit of their labor and patience during the mining days. Although it would be unfortunate if a miner already sold and used all his mined bitcoin since its value now skyrocketed compared to its initial release. However, it isn't too late after all, they can still buy and invest right now, but it would surely cost them a lot because bitcoin has a high value now compared to the time they got it for free by mining alone.