Yes and no. Taken to excess, no amount of wealth will satisfy a miser, a drug for an addict (think of the scene in Scarface where he has a desk covered in cocaine), and so forth. Appetites out of control are a time-honored means to injure/kill oneself, be it by gluttony, power-lust, greed, and so on. Actually, you are in the minority (the happy ones, I'd argue) if you can honestly say to yourself that you have "enough," neither too little nor too much.