What do I do with these????

Okay so if you're a dirty slut for league skins like me you realized the potential in Augment Caches and that they give two shards. So I, very quickly, spent a good amount on Augment Caches. (I ended up getting Soulstealer Vayne from the free gemstones) BUT my only problem I have with this is I have 79 left over PROJECT Cores. Like I have no idea what to do with these they're just here. Do these stay here in my inventory or will there be things in the future I can profit from having these. IDK Help please