I don't think investors are really considering the size of the markets that bitcoin can potentially disrupt.
Bitcoin is the most disruptive technology of the last decade. There have been some large investments in the last years including by Richard Brandson.
people who are using bitcoin are tech guys who believe in future, size of the market cap or userbase doesn't matters with bitcoin
bitcoiners don't care about others, they just care what bitcoin is not what others are or anything else. for me bitcoin is much better then snapchat or anything else like paypal or whatever.
I think 99% of the bitcoin users are tech guys at this moment. We are slowly seeing change with mobile wallets and if you look back at the history of the forum you see its slowly changing.