BLOOD OATHS ON THE INTERNET - FROM STONE MONEY TO THE SMART CONTRACT 27. 06. 2017. Somewhere in the middle of the Pacific Ocean is a tiny tropical group of islands called The Yap Islands. They’ve been inhabited by a native tribe since ancient times, and this remote community provides us with an interesting episode in the history of money: they used money made from limestone, i.e. they paid each other in stone money for centuries. Read more about BLOOD OATHS ON THE INTERNET - FROM STONE MONEY TO THE SMART CONTRACT