What a cool post. You're absolutely right. In issue of DIFF it increases every day. You raised an interesting point. Today I do not mine Etherum anymore. A long time I jumped out of ETH. There are several other currencies that have a higher monthly profit. If you want more accurate information, you can access the: https://whattomine.com/

If you consult you will see that it has coins yielding 3x more than the etherum. The big question is that ETH is now the mainstream for all beginners. No matter when the price goes up, the DIFF goes up as well. I was mining ETH when it cost less than 1 usd. I always like to make it clear that although it sounds easy. Keeping an RIG is very complex. And you are subject to various contingencies. Knowing how to change strategy is essential.