Of course, the most direct cause of bitcoin boom is supply and demand, and all markets are the same, so long as there is demand, the market will become more and more prosperous. There may be many factors in the demand for bitcoin, some people need bitcoin cross-border payment transfer, some people may need to accumulate bitcoins for investment value.
Of course, the immediate cause of Bitcoin's pump is the strong growth of its demand. The demand that we are talking about is something that is a little broad and complicated. For example, the demand had risen so high and fast during the last quarter of the year 2017 despite several negative decisions of some governments. I guess the demand was largely caused by the need of the people of an independent payment system.
Right! The increasing demand is getting stronger, but I believe that we are the cause of its welfare, due to our hardwork, perseverance, and support. At some point, the volatility and media influence have contributed not only a bad image but helped Bitcoin to attract more people to be more interested about the market.