Because of BTC very soon world economics and easier transaction systems revolutionary will control. It's an awesome currency which is can send without any problems and transaction tax less. Bitcoins in yhe whole world one of most important part of economical systems achieved which is as others currency couldn't like this with in short time.
if they knew about it, who the people are afraid of? who said "bitcoin will die"
of course the people who hate bitcoin, they fear if bitcoin, became popular currency