Stratis is indeed a long term project, it hit top 8 in May, but now it is out of top 20 again, the team will work more hard and the market cap will be back. I believe it will go back to top 20 again, they are bringing good product for bitcoin ecosystem.
Yes, there are so many coins such as Stratis, Waves, IOTA, Tether, and Lisk are all great altcoins to invest for the future.
Please stay away of Tether...