It can go into the billions, but it will be really hard and take a long time.
The community really has to get involved, even just simply mentioning Nem to others on other website would help a lot. Just mentioning for awareness, not advising people to buy into it, since it will be looked at as someone trying to sell you something for their own benefit and cause a lot or resentment.
But the community has to get behind it, including mentioning Nem in their Bitcoin talk signature. I see a lot of stakeholders, and many of them don't have a Nem signature.
I think it will take a long time , nem have a long road to go.
1. I think the should give the coin out.
2. Now ,the btc's price is very low, so most of alternate coins have been involved in.
3. There are many copetitions. Such as eth, emu, nxt, xcp, msc, bts..........
So, We still have a long way to go.