I know you said you want an altcoin that can be purchased in bittrex, but I would suggest you check out ICOs. Take for example Angel Token. This is a very promising ICO  that recently launched last November 27. If you take time to read their white paper you will understand just how they would accomplish the x6.9 return on your investment. If you want to be a trader, being part of a community that is dedicated to crypto currency investments would be a huge boost to your knowledge and investment. Basically Angel Token wants to derive its value from the investments that the community behind it would make.