The comics show gold hoarders moving all the gold to the shores of gold.

Made me think about a new high risk high reward activity.

Gold Cargo Runs.

Players who have done the shores of gold and have the gold curse can activate a new activity by speaking to gold hoarder npc.
He will give you a crate of gold coins. The amount of crates vary like normal cargo runs and you can go to multiple gold hoarder npcs to hoard more gold missions (Up to 6 missions, one npc per outpost, potentially lots of cargo to deliver in one go!)

Whenever you have activated the gold hoarder hoarding mission you are marked with a gold beam kinda like the reapers.
You take the shroudbreakers and move the crates of gold to the shores of gold.

Players can steal the gold and intercept the shipment but they must intercept you before you sail into the devils shroud.

Players who steal the gold from the pirates moving cargo as a gold hoarder understandably cant cash in the crate to gold hoarders...but the bilge rats will.

Duke has been pretty naughty, doing dealings behind the gold hoarders back enlisting pirates to steal their illicit fortune.

So to summise...

People who done the final tall tale, had the shroudbreaker and wearing the gold curse can be mistaken as gold hoarders, initiate a mission to send gold to shores of gold. Can stack up to 6 missions and deliver for one big payout but you are marked.

Pirates can intercept but must do so before shroud.
Sell the gold crates to bilge rats for profit.