"Bitcoin’s difficulty adjustment is something built into the Bitcoin protocol in order to ensure Bitcoin has a stable and predictable supply schedule. If there was no difficulty adjustment, all of the bitcoin likely would’ve already been mined and there would be little to no incentive for miners to secure the network. When more miners join the network, blocks are minted at a faster rate as a result of a hash rate increase. The network responds by adjusting the difficulty higher to ensure that blocks come in around 10 minutes. For miners, increased difficulty adjustments mean less profits. For the average Bitcoin user, it means more security for the monetary network they are using."

Nicely written.

The difficulty adjustment is one sexy genius solution.

Bitcoin is perfect.