When you mine a cryptocurrency, you need to be mindful of the liabilities that will cut into your profits: namely, bitcoin’s market price, the cost of electricity, maintenance fees and the cost of your mining equipment and how long it is likely to stand up against increasingly powerful miners. As more powerful machines reach the market, your once-powerful machine might not be able to keep up.
Source: https://www.coindesk.com/learn/can-you-still-mine-bitcoin-and-other-crypto-from-home/