Should I get Genesis 30 or wait until the mini-dungeon event starts again?

As title says, I'd like some suggestions.

I'm near 3k Maple Crystals. Tomorrow I'm going to get 3k. I'm at 2980 ATM :f6:

So yeah.. I don't know. Genesis 30 most likely deflated in price so if it was worth about 500m before, now it's probably worth like 100m or less.
Same for all other skillbooks.

I'm wondering if they'll remove some prizes (like Mastery Books) next time, or if they'll be adding new ones that require more crystals, and are even more expensive (like one of the new chairs, elemental wands <-- lol , etc.).

I'd be glad to wait if they added new rewards like those.

Or maybe the rewards will be the same, and waiting will be useless.

Thanks in advance for your suggestions.