How can you tell that bitcoin is the favorite currency of those who are in illegal business? Didn't you know that even bitcoin transactions are quite anonymous (eventhough it's 100% not), you can't take the fact that fiat and other "physical" things are the one who was mostly used. Bitcoin can't deal with any kind of transaction when you are in illegal business. Bitcoin is just their option but not to the point it was treated as a favorite one.

most of the people think that bitcoin is used for illegal but i think they have no proof about this. because no one know about the transaction of bitcoin. then how can one say that bitcoin is use for illegal activities. i think these all are just the false statement.

Thats right, whether something is legal or illegal depends where you do such action. And Bitcoin is neutral in this regard, because you might indeeed gamble, buy drugs or guns with Bitcoin in a jurisdiction where it is completly legal. Obviously using Bitcoin for purchasing illegal things in particular jurisdiction is stupid, as there is good chance you get catched up by the authorities. So better is changing your location and citizenship if your not happy where you live because the laws are too restrictive, like did many poker players and moved their ass out of the states because the internet gambling is restricted there to protect interest of local gambling lobby.

This is slowly changing:

http://www.techworld.com/security/elliptic-uk-bitcoin-startup-plots-future-in-dark-web-forensics-3643784/

I know that Bitcoin is being used by some illegal activities but I know that OI am not taking part in those things, I am just doing my own thing.
The people that use it for illegal activities should decide for them selves what they are doing.

Bitcoin as a cryptocurrency is the best money transfer that these crooked guys could use. Anonymous, fast and can easily convert to FIAT and can be sent/receive anywhere in the world. Crypto is the way to go, sometimes I wonder why such is being used lesser. I guess there are some countries that will prevent huge cash-out of bitcoin -> FIAT without KYC.

gun , drugs or other illegal buyers are not the problem in the bitcoin , the problem is the hackers who can make an virus or software that can steal your bitcoins.

Yes bitcoin can be used for many illegal activities.Any type of money is used in illegal activity but bitcoin has an advantage over then because no body can who is the sender of the btc.Bank will only know money is coming from bank so no Identity of sender so they can surely use it in illegal activities.

Totally agree, because it is already there since before the bitcoin appears. Bitcoin appear has a purpose for our difficulty in doing deals in the internet, because there are some people who don't have credit cards because each of them registering denied Bank or they do not want to use a credit card because of the cost given is too large

Why wouldnt bitcoin being used for ilegal activities when it offer an almost 100% anonymous transactions? Besides that the fiat has always been used for such transaction something bitcoin can handle the same way as fiat, liking it or not we always have two sides of each currencie.