Mining Bitcoin is actually a solution to a hash function, which is the so-called proof of work. The difficulty of obtaining this proof of work changes dynamically with the change of the entire network's computing power to ensure that a new block is generated every 10 minutes on average. The Bitcoin mining mechanism is that the loser can't get anything, which means that the Bitcoin reward of a certain block is not evenly divided by computing power, but is exclusive to the people who calculate it. In the early days, the computing power of the entire network was relatively low, and it was easier for home computers to take a share of it. But now that there are more and more miners, it is more and more difficult to obtain proof of work, so home computers may never be able to mine Bitcoin. In fact, in addition to Bitcoin, Ethereum 2.0 is now worth considering. For example, QETH from ZB.com lowers the threshold of ETH2.0 mining. If you want to consider the cost of mining, this would be a good choice.