I agree to some of your points but disagree to some like some of the disadvantages you have mentioned are actually an advantage to bitcoin like volatility. But yes, bitcoin is one of the best venture people have invested for the reason that you can even earn a lot money by just using your mobile phone. I am the living witness where I always trade to this exchange site called darb exchange. I always trade there and earn money because of it and I even use that as a payment system to my transactions.