As we have two players who love to chase treasure, we have a group with wildly differing views on wealth.
One player is frustrated by the idea that half of everything goes away constantly. I'm frustrated by how no one seems to answer the question "Okay, you have cajillion bucks, what are you going to do with it?"
Ironically, I who couldn't care less about equipment, money, or any nonunique stuff have plenty of ideas for how to invest wealth constructively where the players who lust for treasure have no idea what to do with it when they have it other than to roll around in gold coins, laughing maniacally something that sounds like "I won, I won."
Let's take generic ale and whores. What purpose does this serve? Well, if you were the character and not the player, it's college (out of some movie for most of us). That's not terribly important in the long run unless the GM requires checks for venereal diseases or the like. I see there being another purpose - establishing one's credentials as a successful adventurer. It doesn't necessarily help reputation mechanically, but it should be part of someone's rep that they party like it's the Year of the Tapir (if anyone gets this reference ... wow!!!). Buying rounds of drinks for the town should be looked at favorably by nobodyfolk, potential employers, potential robbingfolk and other threats. So, it's networking. And, it's a way to (plausibly) lead into more adventures.
Meanwhile, ideas for where to invest I've floated, our GM has floated, or I just thought of include: upgrading ships, which would seem to be of great interest to the PC who wants to go to Vendhya; donate to churches for religious goodwill; loan to rulers for governmental goodwill; loan to merchants for business payoff; put into construction for fixing all of the collateral damage from the last adventure, generating nobodyfolk goodwill; hiring specialists; paying an army; improving the outfitting of an army; silvering up every bashing and piercing weapon in the party including half the arrows (this being rather important in our play); miscellaneous bribes to ease conducting travel or business; good forgeries of citizenship/travel papers; mounts; better mounts; porters, guides, human shields; medical care.
Basically, the primary thought should be how to turn money into goodwill. Having friends/allies/somebody who thinks they can get rich off of you is way better in Conan just as it's way better in life than having a big bank account or driving a Ferrari. Invest in people, first. The long term payoff is immense. Then, invest in stuff that matters like charters and ships and castles on the beach. Then, hit the brothels. Then, make it rain while walking down the street/alley/trail.
Will the GM have these payoff? Who cares? There wasn't any payoff to wealth in the first place. Does my dropping hundreds of silver on a fisherman ... after he already saved us ... mean jack? If it does, cool. If it doesn't, I had no use for the money anyway (besides silvering up weapons). Is my network any stronger than the greedy barbarian's? I don't know. Oh well, at least I don't have to be irritated by how my character is defined by what crap he carries around like is the norm for D&D.