Year 2009 is still memorable for me as this is the year when bitcoin was introduced and that time everyone was in against of bitcoin as it was indigestible for everyone how could one currency be so beneficial so they started calling it a Ponzi scheme or a bubble that would burst soon or scam but still there were very few people who believed on bitcoin and now they are the bitcoin billionaires and after that people understood the potential of bitcoin and now there are millions of people around the world who are investing into bitcoin.