Some of the ressons why most people dont get into bitcoin Its because it volatile nature the current problem with cryptocurrency is that its price is very unpredictable. Today the price is high the tomorrow its down. Due to this investors are scared to invest because they cannot predict how the market will behave. Even with Bitcoin having been working well you cannot still term it stable.People see Bitcoin as a Ponzi scheme The talk of Ponzi scheme has existed for some time.
It is interesting that you say that many people do not get in bitcoin because of its volatility and yet one of the most important reasons of why people get into bitcoin in the first place is the volatility to, people love the volatility of bitcoin because it allows to them to make a lot of money in a relatively short amount of time, the amount of money that you can make in bitcoin is incredible.