If you are talking about "everyone" as people who are using internet maybe there is a possibility but if you are talking about everyone as in everyone then I think we are dreaming here. Even if the technology updates or upgrades too fast, there is always someone who is lagging behind. I say it is a dream because not every one will have access to the internet. Yes, I am talking about ethnic tribes and rural areas of developing country.
I don't think so. Kids and elders use the internet too but they are too young or too old to understand bitcoins. A huge percentage of the internet users regardless of age will not use bitcoins even if people start to hype it up, start to become a social trend, and all. There's just people that do not follow everything what's trendy, the bitcoin haters, people that are too faithful to the government to use a different currency, people that doubt bitcoin and thinks it's a scam, and people that aren't intelligent enough or something to understand bitcoins. Just accept the fact, it's hard to encourage everyone to use bitcoins, at least at this moment.