Is there a way to determine the number of people who are actually using Bitcoin till date? Who would have access to such information? Meaning a way to find out, how many new people have used Bitcoin in 2016 , so that we can say exponential growth is natural not artificially created by hoarders.
There is no way to determine the number of people who uses bitcoin in any transaction and investment but we could determine the value or history of transactions of how much bitcoin is used in an average. We just have the statistics for bitcoin users using assumptions and means.