I find this person (who I believe to have a gambling problem, so he wasn't hard to find) and use my poker expertise to win it back. I then slip it in between Davy Jones' tentacles, where he suctions it.

I steal the coin while he's sleeping and hide it with the evil monkey man in the 9th dimension

I make Jack the Monkey go to the 9th dimension to get the coin back from his monkey friend. He brings it back to me and I give it to Le Porc, who unknowingly puts it in his rum and drinks it down.

I wait a few days and when he goes to the bathroom I put on gloves and take the coin, then give it to the evil monkeyman in the 8th dimension

I call the monkeyman from the 9th dimension (Who is now my friend, thanks to Jack) and make him get it from the 8th dimension monkeyman. Then I close off all of the other dimensions besides this one from Swash so he can't get to the monkeymans in any other dimensions. I then take the coin, and bury it under a giant rock crab

I ally with the rock crab and take the coin and open a time rift to before all dimensions were closed off and then give the coin to the evil monkeyman in the 7th dimension

...I hire OOO-LaLa to transport me to the 7th dimension where I see the evil monkeyman entering the 'Most Evil Villains of All Dimensions' convention...where he pays the coin for souveniers...my companion distracts the vendor and I take the coin...which we end up spending in a photo booth at a 'between dimensions' rest stop/cafe...which I forgot the name of....

I find the rest stop and take the coin then I give the coin to the evil monkeyman in the 6th dimension

well, the evil monkey man betrays you and gives it to the muffin man, my assistant. (Not really). He gives it to me and i order my banana army to protect it....

I take down the banana army with a bazooka and I steal the coin and I melt it with the Flaming Skull and into oblivion.

i used the time machine before u took it and took it to davy jones chest of fake gold indential try to find it now!

I ask Mario to give me a Blue Mushroom, shrink, and enter the chest through the keyhole. I take the gold coin and head into a rat hole in one of the many Taverns in the Caribbean.

I get Master Chief, Captain Kirk, Captain Price, Chewbacca, and the Spanish army to invade the carribean and take the coin. Then I take it and bring it to the Millenium Falcon where I fire the Laser Beams at the Death Star and the Pillar of Autumn then I enter Slipspace and go to the Andromeda galaxy where I hide.

I get Soap to steal the coin from Price and give it to me. Then, I run away into Kingshead jail.

I enlist Earthworm Jim and Link, who decimate the Kingshead jail, and return the gold coin to its rightful owner....that'd be me...which I load into an Atomic cannon and fire into the deepest, baddest reaches of 'inner space',, where the mole men guard it!