I think hampa's the richest, having made lot's of $ from sales of items and toribash related stuff etc.
I've noticed players like jen6, Cytoplasm, Creati0n have all had tones of cash to spend on toribash, so they're probably the richest out of the toribash players right now.
You can't really tell, unless they show their bank account balance, some players could probably buy all the items in toribash with their money but rather wouldn't.
I currently have around 700$ in my bank account, that's quite poor in real life, but since most people who play toribash don't have a job, it's probably up there with the richest in toribash (maybe).