For me, bitcoin was introduced by my friends and told me about cryptocurrency. The things that I can do and the way how you can earn some money. First, I'm not interested in it because I'm busy and can't focus very well on the bitcoin industry. But when I got some time and needed a new source of income, my friend tells me about this forum. After that, I join to this community. I search and learn many things about bitcoin; reading continuously, and gathering information is genuinely the best key. 
Same here! It was introduced by my friend who's past time is trading and luckily I knew about bitcoin and gain a lot from it. I guess everyone is doubting the bitcoin as it is new that time and technology was not that capable of something awesome. I join this community to read and know more about blockchain.