The number of bitcoin users is 2.5 millions. I found this information couple months ago on the net. But I think during this couple months the number increased. Bitcoin as money and as technology are getting more and more popular and used in daily life.
I can hardly believe in that, there are no more than one million of real users; I personally don't know anyone, except me, who uses Bitcoin, not to speak of alts. Many heard about it but nobody ever purchase it
The information we found is just a pure estimate, it depends on us on how we evaluate the data we read, and of course we have to make a follow research as well, that information is vital if you are an investor because the number of users also affect the value of bitcoin from time to time.
This is an information that may actually help someone who is trying to invest in this market, I think large investors probably have good estimates in this regard. The price is related to the number of active users in the network, and it is a result of supply and demand, so I think information like this is certainly able to help them make better predictions.