You are posting these based on what you have heared about Bitcoin; I will urge you to learn about Bitcoin from the links provided to you in the comments section to lear about all these before making conclusions.
Bitcoin if far above what you are expecting and you need to learn before you understand.
Price volatility and environmental concerns are all discussed by several people and we have come to conclude that Bitcoin investment is risky because of the price volatility, and the mining is the main reason why Bitcoin value will keep appreciating with time.