The skeptical me thinks that the miners with help from exchanges are on an operation to save themselves hehehe. Their sustainability depends on bitcoin's price. However, is this plan sustainable?
Miners have sold less Bitcoin (BTC) over the past seven days as the highly anticipated block reward halving approaches. This means that miners expect the price of Bitcoin to increase substantially over time after the halving occurs.
Over the past week, according to data from ByteTree, miners held about 1,067 Bitcoin. Ostensibly, miners hoarding Bitcoin seems positive — but it is not.
Normally, miners hoarding most of the Bitcoin they mine without selling it to cover expenses is not optimistic. But ByteTree’s research paper noted that this time miners may be expecting the upcoming halving to drive the price of Bitcoin up substantially.
Read in full https://cointelegraph.com/news/btc-miners-expect-bitcoin-price-to-surpass-12k-after-reward-halving