I reply after reading the comments so it may influence my answer, but I would emphasize also that he puts "free" education online: https://learn.saylor.org/ I like anyone who promotes education like that. Although in my case I prefer education from universities. Not just about Saylor and Bitcoin but more broadly speaking, I agree though too much concentration of money is never good. But this problem is not specific to Bitcoin and it is the same for gold, very concentrated in the US, Germany and a couple of other countries (source: https://www.investopedia.com/ask/answers/040715/what-countries-have-largest-gold-reserves.asp). African countries are absent from the list, and with big events like war, gold or Bitcoin reserves can get more distributed over time (or even more concentrated).