I will suggest if you want to hold for the long term - Solarcoin. Here is the ANN https://bitcointalk.org/index.php?topic=785257.0. It is a good entry point at the moment and the price goes up every year - I will give you a recent update about the project:

1. ZUP Energy Assets are working on the possibility of a secondary market concept solely for SolarCoin - http://projectsolarcoin.com/#stats

2. Forbes /and many more/ on ACWA Power joining the project - https://www.forbesmiddleeast.com/en/acwa-power-adopts-cryptocurrency-solarcoin/
https://twitter.com/ACWAPower/status/953268756008046592
https://twitter.com/NawiedJabarkhyl/status/955346889183985665
More about ACWA Power - http://www.acwapower.com/en/news/press-releases/acwa-power-becomes-first-utility-scale-generator-to-adopt-solarcoin/

3. Interest from First Utility after ACWA Power announcement - First Utility is the UK's leading independent energy supplier - Possible future adoption of Solarcoin? - https://twitter.com/SolarLux_Ltd/status/952135674483781632

4. Five energy suppliers to accept Solarcoin as payment, from the World Future Energy Summit - https://twitter.com/SolarLux_Ltd/status/953278721770766336
https://ip.bitcointalk.org/?u=https%3A%2F%2Fi.imgur.com%2Fom0JkEz.jpg&t=585&c=RnYdPqjFqqmPxg

5. Exploring cooperation potential between IRENA and SolarCoin at the World Future Energy Summit in Abu Dhabi. - https://twitter.com/SolarLux_Ltd/status/953267042953515008

6. SolarCoin launches Government Policy Paper - Call to Action - https://solarcoin.org/en/news/solarcoin_launches_government_policy_paper-call_to_action

7. What the SolarCoin-Saudi deal Reveals about SolarCoin and China - https://steemit.com/solarcoin/@willcottrell/what-the-solarcoin-saudi-deal-reveals-about-solarcoin-and-china

Some older stuff /you can find more at https://solarcoin.org/en/solarcoin-news/:

1. https://motherboard.vice.com/en_us/article/bmv5na/solarcoin-spacebelt-satellites-cold-storage-hackers-cryptocurrency-in-space

2. https://solarcoin.org/en/news/smart-energy-hackathon-solarcoin-solarpi-team-wins

3. https://solarcoin.org/en/news/electricchain-joins-enterprise-ethereum-alliance-presents-solarcoin-ecosystem-to-european-parliament

4. https://solarcoin.org/en/news/solarchange-wins-oscar-at-blockshow-europe-munich

5. https://solarcoin.org/en/news/exelsolar-joins-the-solarcoin-network

I think it will be an interesting year for sure, probably will go to 5$ in the middle of the year and can hit double digits later - I am riding the SLR train since january 2015 and it might be a slow ride, but it is going upwards so for the long run this is my choice.