Hi, Ive been looking into this coin recently too and IMO OKcash is strongest when it comes to transaction time a low fees. It has strong community (200k Twitter followers,60k Facebook). On top of that it has PoS consensus and earns you 10% interest yearly ( it halves every year after that). Their focus is making OK truly fair and decentralized - a developer, whale or a holder of a single coin have same voting rights. Plus they have IoT integration, which I dont find personally so interesting as I dont really care about IoT, but their devs are cool, they created ROKOS OS for IoT devices that can turn them into bitcoin full nodes, which says something about them. Pretty darn cool for coin with such small marketcap. I think it's a good investment, but of course do your own research, nb can give you investment advice:p.

Here are some links regarding OK:

https://bitcointalk.org/index.php?topic=1028368.new

https://revex.co/okcash/

https://cointelegraph.com/press-releases/okcash-the-sleeping-iot-gaming-giant

https://okcash.org/okcash-for-individuals.html