In regards to circle of competence, I myself think that I have a little of each but am by no means a master of any which is why I like these videos/postings as well as the ones on technical analysis, nuggets of wisdom to be gained from all. The entire Cryptocurrency rise reminds me in many ways of the internet/.com boom in the 90's with 2017 being much like 1997, if we follow that same timeline 2018 and 2019 are going to be incredible. I would like to leave off with a quote from Warren Buffet, "If I taught a class, on my final exam I would take an Internet company and ask, 'How much is this company worth?' Anyone who would answer, I would flunk." So Mr. Buffett stayed within his circle of competence, but he missed Amazon, Facebook, Google, etc.