and you talk about conversations that you've had with lloyd blank blankfein the head of goldman sachs who year after year dismissthe viability of cryptocurrencies and then changed his mind. tell the me about this. >> i think bitcoin is one of the search engines from the 1990s, i don't think that bitcoin is going to compete with the dollar, euro, yen or yuan. but there is a thing inside bitcoin called the block chain. it is a computer science break through which i do think is going to be ooh applied and be able to create -- abc a competitor to the dollar the yuen, the euro, that is going to allow us to do highly trusted transactions between people where normally you would want or need a human like buying tickets, settling a legal contract, stock seams things like this that -- sales things like this that have a lot of friction and olot of cost. i think cost is going to go to near zero as this block chain technology fleables enables it. >> what should i do in this weird changing economy? your answer the most important job you'll ever have? >> being a parent. being a parent. i wrote this