As for now in my opinion it unlikely that everyone around the world are aware of Bitcoin existence already. You know, some people always believe that the level of their awareness are same or should be the same with other people around the world which is not so.
Some people do not become aware of bitcoin existence because they still do not have an awareness of the technology or what happens to the internet. So that makes those people does not know anything about bitcoin. But it makes the young people who always use the internet see the bitcoin promotion from many media. Young people are actively using the internet so that makes them have a big intention to try or search for what they do not know and somehow, some of them are involved in the gambling industry by playing many gambling games.
Knowing about Bitcoin is one thing and believe in it that is something worth investing is another thing entirely. Young people who actually make use of the internet must have seen one promotion relating to Bitcoin or Altcoins but in might not be on a good note because there are so many scam site advertising their services in Bitcoin and Altcoins related stuff and that is in a bad light. We should equally be reminded that it is not only people that comprise the whole world.