Is there some group which collects funds for Bitcoin promotion? If some group like this can create advertisements for Bitcoin, more people can become aware. Such mediums should be targeted which have reach on audience that is still not familiar with crypto.
Until now I have never heard of any group advertising bitcoin specifically. Because in my personal opinion Bitcoin does not require advertising or promotional actions in any form. Because currently bitcoin can be said to have become a very well-known asset. Plus, as far as I know, Bitcoin got to the point it is today, without anyone specifically promoting it (on a large scale). So you could say that all of Bitcoin's success just flows because of the quality it has. So in my personal opinion, Bitcoin does not need advertising. Because there are no factors that require Bitcoin to be advertised.
However, if for example Bitcoin is promoted, chances are that the results will be very good. Because with promotions, Bitcoin will definitely become more widely known.
But as you said, advertising bitcoin definitely requires quite a lot of funds. So it is very likely that all groups/bitcoin investors will be a little reluctant if they have to promote bitcoin by spending their own funds. So in conclusion, Bitcoin does not require any promotional or advertising steps. Because in my personal opinion, although it will most likely be a little slow, it would be better if bitcoin spread throughout the world by itself. So that way Bitcoin will feel like an expensive and special asset.