- My gut feeling is that number of bitcoin holders was estimated a little too small last time - an analysis of Bitcoin client and wallet software userbases, (Rassah! 
) plus Coinbase users, Bittiraha.fi users and Localbitcoins activity, and new user count in exchanges, is what we need to find more reliable figures.
) plus Coinbase users, Bittiraha.fi users and Localbitcoins activity, and new user count in exchanges, is what we need to find more reliable figures.In Japan, 週刊新潮 (Shukan Shincho, a weekly news magazine/tabloid) published a section on Bitcoin this week featuring an interview with a MtGox rep. The rep said that they have 720,000 users, of which 400,000 are active/frequent, and that 20% of their users are Chinese, up from 4% in April.
It looks from this like several million will be the correct figure.