Knowing what to trade is the only way forward when difficulty is too high, although having a lot of altcoins come out rapidly is great for the crypto ecosystem to thrive
Definitely use that power for mining altcoins. They may be worthless in value now, but who knows what happens tomorrow. Also if these servers are somewhere in your work, or school and it means you will have free electricity give it a try. Go to the Hardware-Mining section for more specific help on the issue.