As we all know, the recent 2 months, BTC has risen to $15000 quickly. This never happened is the past. How to explain this phenomenon?The price of Bitcoin is driven by the community. Meaning it could increase or decrease depending on its community. That's the reason why Bitcoin is so volatile in nature. The swift increase in Bitcoin's price would the due to the exponential growth of its user and its demand. We cannot argue about Bitcoin-awareness being spread fast via mass media and social media. This have a big impact in Bitcoin's price. Thus, quick increase.