I'm tired of counting coins and cracking silvers into coppers and NONE OF IT IS FUN!
It's an almost proven fact - As math increases, entertainment decreases.
So here's how we simplify things:
The Basic Unit - A Handful of Coin. What kind of coins? Who cares. How many coins? Who cares. A Weapon costs a Handful of Coin. A toolkit costs a Handful of Coin or two. A days food and lodgings costs a Handful of Coin. If the cost of an item is significant enough to note, it probably costs a Handful of Coin. When you search a goblin for loot, it might have a Handful of Coin.
The Sack of Coins. More expensive items cost 1 or more Sacks of Coin. Horses, Wagons, Sailboats, passage for a long voyage, their costs would be in Sacks of Coin. If the heroes are being hired for a "simple" job, they're going to be paid in Sacks of Coin. 1 Sack of Coin equals 10 Handfuls of Coin. The hero can carry 2 Sacks of Coin before becoming encumbered.
Chest of Coin. For the big payments. Magic items, castles, warships, blackmail, it costs Chests of Coins. A Chest of Coin equals 5 Sacks of Coin. Heroes are encumbered if they are carrying a Chest of Coins, so better get a wagon.
Thus we keep wealth descriptive, math is at a minimum, and you can easily gauge whether a hero should be encumbered by their loot or not. And it should be easy to guess-timate the price of anything.
I got the idea from movies, tv shows, Vikings, etc. They never talk about amounts. When someone buys something, they toss a handful coins down and get what they want. The villain always pays a sack of coins to his nefarious henchmen for a dirty night's work. Kingdoms pay ransom to their attackers in chests of coins. The vikings never sat and counted each coin when they were paid off. They just threw open the lid, looked at the loot, and the deal was done.
Edit>> I thought about just using individual coins to represent the wealth, but then heroes would only find single coins. Getting a Handful of Coins sounds better.