Bitcoin miners have been selling their BTC holdings to cover operating costs, according to data from IntoTheBlock. Over the past year, miners' holdings have decreased by 4.74%, from 1.99 million to 1.90 million BTC. While the selling volume is not significant, it is likely that miners are selling to cover operating costs. The price of Bitcoin has fallen significantly in recent months, and this has put pressure on miners' profitability. Miners are typically paid in Bitcoin, so they need to sell some of their BTC to cover their costs, such as electricity and equipment. The recent decline in the price of Bitcoin has made it more difficult for miners to do this, and they have been forced to sell more of their BTC to stay afloat. The decline in miners' holdings could have a negative impact on the Bitcoin network. Miners are responsible for verifying and processing transactions on the network, and their holdings provide a buffer against attacks. If miners continue to sell their BTC, it could make the network more vulnerable to attack.