Aside from the factors given by OP, I think one of the main reasons that prevent Bitcoin's worldwide adoption is the fear of the worldwide economic control of a few people that holds a huge amount of BTC.  Imagine what will happen to the worldwide economy if these few people command the market.  Superpowers like the USA will definitely refuse this kind of thought and it will be devastating if few individuals with little knowledge of the economic system lead. It will be chaos if ever these people decided to crash the market affecting the global economy.  We have seen how this works when someone decided to sell their huge stash of BTC, the price crashed and lots of investors lost a huge amount of money.  Just replace these investors by country, then we will imagine what will happen.