Gold is only useful when spent, and Shadowrealm has five quite different places to spend it. They are not interchangeable: each solves one problem well and is poor value for everything else.
The Blacksmith repairs worn gear, sells equipment forged for the city you are standing in, and strips enchantments for a gold fee. Repair is the reason to visit: gear condition silently reduces the stats your equipment contributes, so repairing is often the cheapest power increase available to a player who has been fighting for a while.
The gear on sale is tied to the city, so the Blacksmith’s stock is a reason to travel rather than a reason to stay. What is available in a higher-rank city is meaningfully better than what your home city offers.
The Reliquary sells crafting materials outright for gold, at a stock level that thins sharply with rarity: 100 common down to 3 legendary and 1 mythic.
This is the reliable way to finish a recipe you are one material short on. It is a poor way to source materials in bulk, because the thin high-rarity stock means the top tiers run out and you are competing with every other player for them.
The Black Market rotates its stock roughly every 20 hours and charges a 2x premium over normal prices. In exchange it will offer things you cannot reliably buy anywhere else, gated by rank rather than by luck.
Paying 2x is only worth it for something you actually need now. The rotation means checking it costs nothing and is worth doing when you pass through, but standing orders here will quietly drain a treasury.
The Den sells energy for gold, at 1,000 gold by default, and it is the one place in the game where energy can be pushed ABOVE your normal maximum. That overflow is capped at 100.
Because energy is the real limiter on how much you can do per day, this is effectively the exchange rate between gold and progress. It is priced per city and the price responds to how busy the realm is, so it is worth comparing before buying rather than assuming a fixed rate.
The overflow matters for a subtle reason: because paid energy can sit above your cap, nothing that grants energy should ever clamp you back down to maximum. If you are holding overflow, spend it before claiming other energy rewards.
The Fence converts stolen conveyances into gold. It is the counterpart to the Stables: steal a vehicle, decide whether it is heist fuel, salvage material or simply money, and if it is money, this is where it becomes money. Damage reduces what it pays, and repairing purely to raise a fence price is usually a net loss.