You know how it is, you open your crates and get an entire warehouse supply of potions and poisons, and then convert all of them for the vast some of ~5 crown gems. Or you get crown souls gems, and convert them too. Or your 100th nix-hound pet.... and you slowly build up your crown gems.
Do you purchase something as soon as you can? Or save for the legendaries, or even the apexes?
I'm sitting on 75 at the moment, and tempted to save for an apex mount (or even just that Pellitine horse, which looks awesome) - but considering I only get crates from my subs and free giveaways, it's a fairly slow process...