Don't forget that Bitcoin investment is different from fiat investment, because if you fail to follow the Bitcoin rules and condition you will definitely lose your bitcoins at the end of the investment. I think you sold your bitcoins when the price is low in the market, which will not allow you to get what you want from the market at the moment. I will advise you not to give up on Bitcoin, because Bitcoin has helped many people to improve in their businesses that made them to have more interest on Bitcoin investment than any other investment in the societies.