Crystal hording.

Don't horde crystals, horde energy for the cap increase this week. Can store up to 1999 energy and 999 for cantina.

EDIT: I'm assuming you are player level 70. If not, then I'd recommend saving crystals and use excess energy on farming syringes, cuffs, and hairdryers. You will need a LOT of them. Don't spend mats gearing players until you know the new meta (ESPECIALLY if you are F2P)

Well I horded crystals so I can buy energy to horde. Wouldn't quite get to cap because i was drinking last night, and forgot.

Save everything until this thursday

Saving purple mats, credits and training droids.

Also I slowed on my refreshes and stopped gear farming, I only use the free energy to farm hard nodes and Old Ben from cantina. By this I've accumulated more than 1.5k crystals in one week.

I don't think there's a "right thing to do". It is a game. You should play however makes you happy and in a way that provides fun. Do not turn it into a madness :)