POS coins that Ive held for 3 years, have active devs, updated apps available and a good prospect to growth would be Blackcoin BLK and Energycoin ENRG
Both are really fast, cheap and easy to use. BLK was the basis for the development of many other coins that followed and have an active dev team. Both grew some in 2017 but are far from as highly rated as most popular coins so are cheap to accumulate, hold, stake
Agree. Blackcoin is one of the oldest PoS coins around, yet it has managed to bring innovation to the crypto space. With different inceptions of PoS provided by Blackcoin (such as PoS 3), it shows us that it has active development and dedication that will ensure its survival in the long term. The best thing of all, is the cheap fees and speed of transactions of this coin. As such, it will be worth investing for the long term.
Energycoin is another great PoS coin to invest into given its stability over time, and active development. On the other hand, there are many other PoS coins which are interesting such as PIVX, PIGGY, BitBean, Emercoin, Peercoin, Hyperstake, LiteDoge, and even Magi. They all have a supportive community, and most of all, great rewards that will allow you to multiply your investment for the long term.
Nevertheless, always look for PoS coins with a solid development team, and community, that will ensure your success in your investments for years to come. Just my thoughts
