It depends on what the investor expect from the investment that he/she made. If the investor looking for an investment that provides; Inflation protection, decentralization, low cost transaction, currency transactions run smoothly, privacy and security and simple transfer of funds. Yes, ethereum is good investment. However, if you are no comfortable with risks such as, risk of data loss, power is concentrated in several hands, no refund or cancellation, excessive energy consumption. Things will be change.