the so-called founder, satoshi nakamoto. the ben bernanke of bitcoin.nating aspects of the story. i use that term loosely, it could have been a woman or a group. >> a figure. >> known as satoshi nakamoto. he wrote a paper published in 2008 about it. he then released the first version of bitcoin, 0.1 in 2009. by 2010, he had posted about 100 times on the boards about it. he handed the day to day business of developing it over to gavin andresen, who some people speculate maybe satoshi nakamoto. he said he will move on. he went off the grid. does the mystery and anonymity of all this give you pause in how valid bitcoin is. it does not make me feel good. >> it is a question i put to very sober -- to barry silbert the other day. thought,im what he he said hessen, has knows who the guy is? no, we don't have a clue. he said it does not bother me at all. >> let's talk about what happened to that point overnight. -- to bitcoin overnight. >> it got crushed, china is tightening controls. it is no longer allowing btc china, which has become the biggest bitcoin exch