He founded the MIT Media Lab Digital Currency Initiative, so he must have a pretty good grasp of the domain (http://joi.ito.com/weblog/2015/04/15/announcing-mit

He founded the MIT Media Lab Digital Currency Initiative, so he must have a pretty good grasp of the domain (http://joi.ito.com/weblog/2015/04/15/announcing-mit-dci.html http://joi.ito.com/weblog/2015/04/15/announcing-mit-dci.html). He also held stakes in Blockstream, who favors small blocks (http://joi.ito.com/coi.html http://joi.ito.com/coi.html).