According to the data from the beginning of this year there are now over 10 million bitcoin wallets. I would rather assume that 1 bitcoiner might be using 2 or more wallets.
For example online wallet for quick access and fast transactions and full validation software wallet as main wallet.
With bitcoin wallets being free and easy to create, it is illogical to think that multiple users are sharing control over one wallet.
Provide the links to your data, about the average total number of the wallet, are using by bitcoiners are need more researchers and taking some sample of bitcoiners.
In this article you will find info about number of bitcoin wallet in existence.
http://www.coindesk.com/2016-bitcoin-challenge-100-million-users/According to the data from the beginning of this year there are now over 10 million bitcoin wallets.
You have to be clear, are you talking about empty wallets (with zero transactions), or wallets with a balance, or wallets that had a balance but are empty now?
We can't tell, article I quoted was unclear on this.
Don't forget that the largest exchanges have tens of thousands of addresses just belonging to them. And that's with one exchange. And as you know, there are plenty. Then we have online wallet services, mixers, gambling sites, faucet sites, etc. The far majority of these wallets do belong to one of these services.
And it exactly proves my point that there are usually multiple wallet created under control of one owner. So the number of wallets can't be definitive factor when estimating number of bitcoiners.