Reminder: Collecing virtual funkopops in WoW is braindamaged cattle behavior. There is absolutely zero challenge to collecting virtual funkopops, it is nothing more than gambling where the cost is time.
You can only equip one mog, ride one mount and have a single pet out at a time. Get the one you care about and use that, there is absolutely zero reason to collect outside of mental illness.
The only WoW gameplay that matters is progression. Play each season with progression goals in mind and you'll be better for it.