What items will rise in price? Things to keep on the long run?

[Vindex]

Now that everyone is leveling atm, things like worlddrop recipes and gathering materials aswell as materials used for raid buffs are much cheaper than later on.
What are some smart items to stack up now, and sell later?

[jmulhern345help]

I'd advice to research 19, 29, and 39 twink items and buy low now that there is mass farming going on.