Do you know the number of wallets opened so far? Do we know the number of people using bitcoin?
Where can I get this information? Thank you.
There are many wallets now and there are types of wallet that is mostly used here: online wallets and cold wallets.
We don't know exactly the number of people who used bitcoin because it is not important for it cause it is not produced by government. The maker of it is unidentified person who's alias Nakamoto. You can get also information here by searching.