There are pros and cons to mining. If you had bought $1,000 worth of cryptocurrency in May 2017, rather than equipment, you would have had an average return of around 300% when investing in bitcoin and ether, 250% in Dash, and 250% in Monero.
And these are just some of the most popular and well-known coins, there are also some that have grown much more.
However, rate volatility is almost unpredictable, and the pluses of mining – you get cryptocurrency in your wallet immediately, no need to look for ways to buy it with real money, you will not be cheated when exchanging real money for digital. Plus, there will almost always be rewards as long as the hardware stays up and running.
Over time, though, due to technical obsolescence and increased competition, the income will diminish.