Thank you all, I will be patient and I will use the gem in another champion that really needs it
I used my gem on sparky, but I see yours is already awakened lol. So I'd say you have a few champs that are worth it - medusa, hyperion and ghost. So your 2 options are to use it on one of them or to save it. I have a science, mystic, skill and mutant gem saved up in case I ever pulled omega red, blade, nick fury, aegon, ss, void, capIW etc but I never have, so they just sit in my inventory doing nothing as I really have no options for them. I would personally use it on hyperion. He is insane for so much content like variant and act 6, and if you ever pulled a cosmic gem you could use it on medusa, and in time I do not believe that you would regret it, and you have to keep in mind that you may never pull one of the characters you really want to use it on like aegon.