This is a nice read. Extracting from what I read. Bitcoin imposed a greater risk on the security with the transaction over the internet. Terrorist can buy and can be paid almost any time without the undue noticed of authorities. Hacking and other fraudulent act makes bitcoin a susceptible target. While I can say that aside from this major disadvantage bitcoin has created a diverse ecosystem that is continuing its success until today. So many are investing, demand is increasing, supply is decreasing and the price is increasing as well. Some other countries still ban bitcoin, and other countries lack knowledge about this cryptocurrency, so it is still hard to be adapted to these countries.