internet users covering almost all of humanity. if 25% of Internet users use bitcoin., would be a lot of users who have used bitcoin.
but the reality is still a bit of bitcoin existing users
Well only the ones who are interested in having an online jobs the ones who are using bitcoin and most internet user are only using the internet to brag about themselves on FB and such social media sites.
50% of internet uer know about trading forex, 30% of them use paypal, and 25% of them know and use bitcoin
just my opinion no more

much more like 25% know about bitcoin, but only a tiny % of those 25% are really using bitcoin, then you have those that know about it but are not using it because they have a few coin and prefer to hold
and those that know about it but see it as a criminal tool and don't have any coins