Like a lot of others have said you should hold him and wait for an upgrade card and either use that or sell because his price is already insane and if and when gets an upgrade it should only go up.

i got lucky and pulled his core elite out of a GAG pack a couple weeks ago and told myself I’d hold onto him until he got an upgrade to maximize coins but I caved and sold him a couple days ago and instantly regretted it.... don’t be like me lol