It's hard to calculate how many people are using Bitcoin because Bitcoin is already known all over the world and new people keep on joining everyday so it's hard to count it.

It is very difficult to account on how many people using bitcoin that is why we cannot compute the exponential growth of the people using bitcoin from 2016 until now. Maybe it can be done in estimates through bitcoin addresses.

I think it's very difficult to know the actual number of bitcoin users, because I think the bitcoin users are unknowable and it is impossible to predict the exact number of bitcoin users,

I think there is no way to know exactly how many bitcoin users are. First, because of anonymity, second though we can see the transaction and wallet data we are not sure of it because it could have a double wallet.

Well it's very hard to determined the actual number of people who using bitcoin because as a matter of fact it's been around the world people join bitcoin.I think at present more and more people now in active in bitcoin and it makes bitcoin more popular in the whole world.

It is impossible to know the actual or exact number of people who using bitcoin every year. We cannot also depend the number of people who using bitcoin by the wallet address, because some of bitcoin users use two or more bitcoin wallet or digital wallet. We may measure that the number of people who using bitcoin is increasing because if you use internet, there are many pages or sites saying about bitcoin. Many people will see that, and maybe they will curious what is bitcoin and they will find out what it is. And they will know that they can earn money using bitcoin. Therefore, the number of people who using bitcoin will increase.

I don't think there is really a way to determine the actual number of people using bitcoin.  we all know that there were so many people using it but there is also no way to know how many . as we can't base it on the  wallet addresses only or whatsoever as this is blockchain.

Its hard actually to determine the actual numbers of people using bitcoin or are involved in bitcoin, the fact that bitcoin now become phenominal and has huge follower and user it would quite gard to detect how many in all are using it.. but these numbers actually is more favorable to bitcoin becuase it only means that they're capturing many attention, and investor.

I think they know the actual number of people using bitcoin because there is a people that is assigned to know it. Actually they can count it when we make an account because there is a record if when someone make an account or join here in bitcoin.