Its really difficult to come to conclusion that what exact number of users will be holding bitcoin by that time, but one thing is sure that we will be having increase in user base of bitcoin by that time.
By what time? I hope you realize that it's halfway through 2016 already.
I also pulled that theory out of my ass so no guarantee is means shit.
No one can predict the future, so it's likely that yours is as good as the next. However, assuming that 75% of this forum's userbase accounts for the people that use it is probably stretching it, taking people with multiple accounts (as in 4+) and accounts created by bots in consideration. I'd say it's more like 40%, if that. Also, I doubt that 30-40% of bitcoin users use this forum.
But other than that, it sounds solid.
