The reward for proof of work (POW) mining, a cryptographic proof in which one goldshell kd6 mining profitability party proves to the other that a certain amount of a specific computational effort has been expended, is a “block reward”. For Bitcoin miners, the revenue generated by their operation is simply the number of Bitcoin rewarded multiplied by the current Bitcoin price. 

Bitcoin’s protocol includes a unique network difficulty adjustment that ensures that a block is rewarded roughly every 10 minutes. As a result, as mining becomes more profitable, market forces will attract more hash power into the system and the Bitcoin protocol will systematically adjust the difficulty level in earning a block reward higher. Thus, making an ASIC miner's performance a strong influence on the current market price of the machine. 

Network difficulty exerts downward pressure on the value of ASIC miners. The market participant evaluating the value of a miner at any given time will need to make an assessment of the current and future growth in network difficulty in order to make a reasonable assumption on the value of the machine today.