Lets hope to hit that today! 70% and Growing
I'm ready. I brought two more S9's over to BitMinter to try and speed it up. Plus anytime it starts looking like it might be a super long block, I try to start ramping up some extra hash power.
That's also my intention with other 2 S9 that I'll receive in March. I just hope they will able to repay themselves because of the difficulty that is increasing so badly.
As long as they are profitable you should be good to go as they will eventually pay themselves off. Of course, the higher the BTC value is, the quicker it's paid off. You can always sell off one of your S9's which then covers the cost of the first one (by eBay prices) and you are in the green on the one. That's always an option and one I considered as well.