I think, people are still buying bitcoin bbecause they believe it.They can only follow the recent trend in which bitcoin is gaining in popularity. People believe that bitcoin will give them a big advantage over time. If this reason makes people buy bitcoin then people need to be vigilant because it's a speculative one. No one guarantees how much profit from bitcoin. But if someone buys bitcoin by first doing an analysis of the market price then I believe that it will most likely be profitable. Someone who has analyzed the market price must have prepared a strategy to play with other bitcoin players. This is an intelligence.