We all know that bitcoin is consider to be the very big boon for the entire humanity and there are millions of people who find bitcoin trust worthy and it has millions of investors but inspite of having numerous of advantages, bitcoin too have some some disadvantages and the most important one is is its illegal use world wide allies ke selling drugs, explosives, money laundering and child pornography is one the most usual use of bitcoin and inspite of banning bitcoin we guys need to improve this illegal use.