Define "large number of people".
If it is clearly stable and long term, even a few tens of thousands of legitimate users can be counted as success, I guess. But note that there must be enough payment volume to support the miners through fees, once block reward dwindles.
And in the interests of making it a fair experiment, do you ever worry that your posts/articles might prevent that limited adoption happening (which would seem very unscientific)? And if not, what is the purpose of making them?
Finally, do you have a hat that you would be prepared to eat in the event that your threshold for adoption is met?