Why is mining difficult?

Difficulty Adjustments At the beginning of every epoch the Bitcoin network recalculates the Current Target. The network does this by summing the total minutes it took to mine the last 2,016 blocks . It then compares this total to a desired rate of 20,160 minutes (10 minutes times 2,016 blocks).

Cryptocurrency difficulty is a measure of how difficult it is to mine a block in a blockchain for a particular cryptocurrency . A high cryptocurrency difficulty means it takes additional computing power to verify transactions entered on a blockchain—a process called mining.

Miners compete against each other for limited block rewards. With more participants and more computing power, the so-called “hashpower” of the entire network increases accordingly. … An adjustment of difficulty upwards or downwards depends on the number of participants in the mining network and their combined hashpower.

Bitcoin mining difficulty is a measure of how difficult it is to mine a block in the network . It automatically adjusts approximately every two weeks. While more miners join the Bitcoin network, the Bitcoin mining difficulty increases, and when miners leave the network, the Bitcoin mining difficulty decreases.