Bitcoin does not necessarily need advertisment because when something is too good it can't be hidden, it is a choice to either invest in Bitcoin or not, advertising Bitcoin now is not something to be bothered about because it has pass that stage and has gotten the recognition needed . Investing in Bitcoin should become more of self convinction and not because it is what every body is doing or talking about, who will invest will invest and who will not invest will not invest irrespective of how much discussion and adverts.
Seems you are missing the point on what advertisement is and that have to be corrected. The news you see on the print media, the hypes and all the excitement about the bull run are all different forms of advertisement.
Lol, it's very funny how some people feels that advertisement only involves coming to the media to announce about bitcoin and convince people on the need to invest in Bitcoin but just like you stated, the news of the upcoming halving and bull run is making trends on the Internet and so many people that were not interested in investing in Bitcoin are picking up interest base on that and Bitcoin creating a new ATH before the halving is another news that broke the Internet such that many people were also eager to invest in Bitcoin and since people always want to see results from others before developing interest, so the news of Bitcoin breaking a new ATH also made lots of investors to come in, these are various means by which Bitcoin have been advertised in many instances.
To be frank with you, without the news about Bitcoin spreading in the print media, most of the people that are invested in Bitcoin might not have even known about it. Some of us here came into Bitcoin because we heard about it from friends, social media or different platforms. I agree with you that investment in Bitcoin is a personal thing that does not require any convincing but the potential investor must first be aware of Bitcoin through someone or some means before taking that personal decision to invest.
That's very correct, the news of Bitcoin spreading across the print media also aided in the advertisement of Bitcoin and made most investors to come in to invest in Bitcoin. Bitcoin have been advertised in diverse ways just like other assets as those advertisments are what entices people to invest in it because without those medium of advertisements the hype in Bitcoin would not have gained this level of popularity and recognition it has gotten so far.