Looking at the basic fact about the limit of bitcoin according to the protocol for the bitcoin network,it was design with a limit of 21 million coin.
My question now is are cryptocurrency miners be unable to generate new bitcoin after it reach the 21 million coin limit?
Since there are over 19.15 million bitcoins in circulation if am not mistaken.
Miners get transaction fees as well. So when the limit is reached, it would be the source of income for miners. Algorithms used in some coins actually don't have mining process at all, and what server holders get for their work is only transaction fees. Some coins are the opposite: they can be mined endlessly. It depends on the algorithm.