as we know so many reason to make controversial bit coin currency in practical or real media sanitation. if we observe very carefully few past few years we have seen that criminal activities or occurrence are occurred by the help of hackers and trader make it famous moving thousand of dollars outside by cheating with government law enforcement for that reason value of bitcoin increasing very high. even they make money away from center bank and government unable to hold money from general people and through this process people convert this money into different things. i think this is enough for making controversial and what do you think about my think ?
Anything that empower the individual is always controversial, just look at cryptography many countries hate that fact that the average people has now access to military grade encryption, since now a person that does not want to reveal his information can encrypt it and if does a good job then there is not a way to access that information and bitcoin is similar, bitcoin empowers people around the world and the more power people have the less power governments have over them.