I can not give you exact numbers.  Try to assess them taking into account some facts:

1]  Nxt does not require to waste electricity (no centralization of mining power around pro-miners)
2]  Colored coins will lead to a revolution in finances (decentralized exchange of property in atomic transactions)
3]  Instant transactions (I can't find words to explain how it's cool)

Nxt collected 1,500 USD worth bitcoins.  I'll eat my hat if in half a year they won't be worth a couple of millions.