yes all depends on bitcoin users. bitcoin used more and more in this life then the better the future of bitcoin in the world. bitcoin depends on the strength of people in this world.
Yes, I really agree with your opinion. The cost of bitcoin will be based on the number of participants and investment in it. So I think there will be a strong uptrend of bitcoin in the next 4-6 years. I hope that everyone will respond positively to the market of bitcoin so that it grows stronger. As bitcoin has grown, improvements in the economy of many households will be improved.
It will become the bubble or ponzi project if the Bitcoin value increases by this meaning. The value of Bitcoin should increases when it can helps us solve something important and we need to have good reason to buy it at high price. However, currently, I still do not know any good thing to help Bitcoin price increases.