I know how mining works and how transactions are added to the blockchain. What I don't understand is the association between the two...if any.
I've read a few times about how a cryptocurrency transaction is added to the blockchain through consensus. This often means PoW. Then there is mentioned that miners perform PoW and the transactions are cleared. How?
Miners mine for coins right? What does mining have to do with verifying unrelated transactions?
At least for bitcoin, is it even possible for miners to keep up with all of the transactions occurring?