I assume that there aren't many people around the world that have bitcoins.
Does not owning a single satoshi disqualify one from been regarded a bitcoin user in this scenario
There are probably even fewer that actually use them. I'm sure lots of people are just getting bitcoins and holding them.
Most likely we have few active bitcoin users
Its probably even difficult to get the right estimate of the number of users generally using the crypto through the forums registered members because of farmed a/cs and the alike, others use it totally anonymous to avoid unnecessary attention.