Open trading account 
If you ever go on holiday in the western Pacific it is highly recommend to swing to the Yap Island. An experience in Micronesia you will never forget! It is home of the most interesting form of money in history and called the “Land of the Stone Money”. About a thousand years ago natives mined huge pieces of limestone and carved them into gigantic circular discs (approx. 5 to 10 feet in diameter). Over a foot thick and weigh several tons. They called them "Rai Stones" and they were actually used as currency.
Oddly enough an individual rai would be valued not based on its weight or size, but based on its story. If many people had been killed transporting it, or if the stone had once belonged to a famous warrior the rai would be worth more. So it was a bit of a collectible as well as a form of money. Needless to say that they wouldn't be moved very often. Everyone on the Yap Island just sort of knew who owned each rai, like a primitive form of Bitcoin's blockchain.
Oddly enough an individual rai would be valued not based on its weight or size, but based on its story. If many people had been killed transporting it, or if the stone had once belonged to a famous warrior the rai would be worth more. So it was a bit of a collectible as well as a form of money. Needless to say that they wouldn't be moved very often. Everyone on the Yap Island just sort of knew who owned each rai, like a primitive form of Bitcoin's blockchain.
