Theoretically, mining an Ethereum, or 1 ETH, doesn't take long. Ethereum has a block time of around 13 to 15 seconds, and each block rewards 2 ETH. An Ethereum mining calculator indicates that 63 blocks are needed to mine a single Ethereum. This process can take up to seven days on a GPU.In recent years, the number of miners joining networks has increased significantly, resulting in more ETH flowing into the network every day.
As mining difficulty increases, this statistic is expected to continue to rise.