Please just tell me if I should be saving relic shards!!

It has been a frustratingly long time since we've gotten any update on relics. I understand that the dev team doesn't bother sharing news until they have something useful to say. But i would just love to know: should i be holding on to these relic shards? Or just trade them in?
I find relics useful a combo extenders, but i already have all the 3* relics and most of the 4* ones, so I've been holding back my shards until more get added to the pool. But is that ever going to happen? Or is Kabam going to introduce new crystals when they finally start relics up again?
I find relics useful a combo extenders, but i already have all the 3* relics and most of the 4* ones, so I've been holding back my shards until more get added to the pool. But is that ever going to happen? Or is Kabam going to introduce new crystals when they finally start relics up again?
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If I were you, I'd just open a bunch to get the fragments to start forming more 5*s, and in turn form more 6*s.