Bitcoin is a digital asset, not a ponzi scheme and not a fraud. People may think that it is a ponzi because they do not know what it is all about. I never believe that Bitcoin real till a friend of mine that is into it explained to me; what it is and how i can invest there and make money. Now, i am the one spreading the news of it. They did not understand the blockade and the crypto currency and are angry when others make money on it, but they do not.