stress that it's a very powerful technology if we do it right we. and create a universal what i like to call freedom machine that enables us to have a peer to peer economy with less centralized institutions. but if we get it wrong we could also create a universal control machine so i think we have to look at the to privacy privacy versus transparency in a data driven world who owns our data and where do we store the data and are we in control of our digital trail and those will be very important questions especially in the light of decentralized technologies they are big questions definitely something that i would want to know where my data is being held for example who owns it how long until we're talking about blocked chain is a household name i mean would it just be for business people will i be using it then every day way. the block chain is operating system