What ROI do you want? NEM has a very good chance of hitting 50-100m within months, so that's an easy 10K / 20K per stake.
Then there's always holding until the coin goes to the moon. Crypto currencies will probably hit $1 Trillion in a decade.
As a layman I see comparable coins with comparable market caps that have already been released that are not near the same value. So I am a little wary of a coin that isn't even released yet that is already valued higher then, what I as a layman consider comparable cryptos, is higher than ones with similar stats... All cryptos (and from what I am learning there are a lot) claim to have something that sets them apart, but when it comes to statistics the only thing I see that makes a difference is anonymity. Everything else just seems to be packaging, and everyone has a "new bell and whistles!"
Please do not misunderstand me as FUD, I am just needing a clear picture before I invest, and hopefully this will assist other people like me who need a clear picture. Thank you for your time! Good luck on your Alpha release tomorrow, I'll be watching with curiosity!
Please see this post I've made earlier, it might actually help in understanding some of the mechanics of the altcoin world and how NEM strives to be different.
https://bitcointalksearch.org/topic/m.7122197