I think that the number one coin positioned to gain value in 3 years right now is Berry, which is partly because it's only available on hitbtc and Idex. As soon as it hits a bigger exchange it's going to take off. Currently its value is way below what was paid for during the ICO and the $30 milllion raised divided by the amount of coins available (300 million) gives you .10 cents a coin and right now it's selling for .05 cents. This should easily double in the near term and should be way more valuable long term. The team is a seasoned group that is working toward the app release and they already have a working product that is bringing in revenue. You can see this yourself at their site http://rentberry.com

Rentberry is also going to be announcing a partnership on April 30th and in May which should only help boost the value of this coin further, not to mention the circulating supply is even less than the 300 million around 223 million so that just helps the value increase. Because a lot of the ico participants paid way more there's a large amount of hodling already happening, definitely a good one to watch or get in while it's low.

I’ve also found their team to be very receptive on their telegram chat room: https://t.me/RentberryNews