Convert multiple GPU mining rigs to... what?

Hi friends!

As many people I discovered in 2018 mining... I bought first some GPU cards, than create my first mining rig with 13 cards.
Then I created a second, third, etc... and now I'm having 5 rigs of 13 gpu (5 * 13 GPU) that are not running anymore.

My huge question (I know there's no only 1 answer on this topic): what can I do now with those harware stuff?
I don't want to sell items. Not my target.

But I'm searching how to use this GPU power on projects ? ideas? tools ???

Thinking 1st about using hascat and spread the hash computation of rigs ...
Thought also to put projects on TensorFlow ....
... if it's possible, I'd like to put a project to generate something (money generation is welcome

Your ideas? Tips? Thanks for sharing!
Have a Happy New Year friends!

You could do some cool stuff with cluster computing. Maybe try and run a distributed CUDA program. Check this out for inspiration. https://tinytitan.github.io/. Another Idea: Start your own cloud gaming service lol

Maybe try and run a distributed CUDA program? I'm also interested in this subject bumpp