Bitcoin was created for everyone but everyone has actually heard about Bitcoin. Over the years, Bitcoin being a genuine project and lead several persons into sharing it's good news to others and that's one of the way the network keeps expanding. I've actually come across anyone being paid to advertise Bitcoin, because the legacy it has created still stands but today, the current trend of cryptocurrency is only trying to create a bad legacy for Bitcoin as most persons generalises Bitcoin with other cryptocurrencies this making the errors of other to be part of Bitcoin.
there is not product that doesn't need advertisement, they're people that still don't know about Bitcoin and its services, Bitcoin still need more enlightenment and advertisement on how to stop scammers. This will encourage more people to invest more on it.
When you advertise a product it help reach more people and countries, Bitcoin needs daily advertisement to enable countries that ban it to see reason of it credibility.