warren joins us now sheila, before we get to the broader issues of block chain let's start with janet yellen's comments about bitcoin she said it was inefficient, highly speculative and the amount of energy consumed in processing the transactions is staggering what do you think of her comments >> you know, i think it's interesting that janet yellen has had speculation about what she says and what it will mean for the market i think it's not unfair to say bitcoin has been a volatile and speculative asset. that's fairly obvious. it's all relative to what when we think of the existing financial system and how much it costs to print and store money some energies are considered not okay i found that an interesting point brought up in the criticism. >> what do you expect this year and impacting this volatile chart that we're looking at right now? >> well, i do think we're going to see more institutional investment we went out big last year and the recognition by institutions bitcoin can serve as historic value. that is a proven concept it's a done deal bitcoin will be a diversification stra