Provided that the team will continue working just as hard, I don't think there's anything stopping ZED from becoming a top-10 currency during the course of the next year or so, I'm really excited about the prospects here.
Yes, indeed the team must work harder, I also think that in the future zed will be the top 10 in the world of cryptocurrency 
Looking at the Stellar it takes some years to become the top 10 on CMC. But here we`ll have finished platform with the real usage before the ICO ends, so who knows)
But I`d rather suggest to take a closer look at the platform benefits and ZED features than make those predictions.
Both Stellar and Ripple are eager to occupy the place that the SWIFT payment system now occupies, uniting all financial institutions of the world in a single network. As for now, Ripple looks is more powerful, there are more influential allies, and funding is much better, but the support of the masses of users who prefer Stellar can play a decisive role. Therefore, those investors who believe in the blockchain revolution in the banking market, pour their money into both Ripple and Stellar in order to ensure the winning role of both in this huge market. To fight against Ripple and other competitors, Stellar uses technology - working and already benefiting from the blockchain, as well as one very powerful ally - the technology giant IBM. At the end of 2017, Stellar went into the technological gap, starting to introduce the advanced technology of scaling Lightning Network and master the sphere of smart contracts, where Ethereum dominates, and where Ripple's foot has not yet stepped. And this is why IMO, ZED Network team chooses Stellar as a base.