Need some advice on when a caster has to become a fighter [5e]

[Man_Over_Game]

Apologies for a derail, but I've got a player that loves to collect absolutely everything he can get his hands on. This just triggered me. I'm sure he'll go for a vendor selling some "Magic Beans", I reckon 100 gold at least.

Tell him to check out the Numenera system. Every magic item is a unique, misunderstood object that usually has a one time use, and occasionally has an important use later.

That gravity bomb? That's actually a force stabilizer for a mass-produced portal machine that the party comes across later.

The Eye-on-a-stick that looks at you when you think about it? It's actually supposed to be a quantum detection device used for Robot Assassins, so that they know exactly who's thinking about them, and you happen to know a blind one who might pay a pretty penny for it.

You collect a ton of things to hopefully use for something important in the future, or to save your bacon in the immediate present. It's like playing "Magical Hoarders, the RPG".