It is not necessary to specify which type of advertising is better. It is necessary to use all the available advertising options, and then the results of the ICO will be more positive.
I think if someone wants to promote their product, they need to use all sorts of ads that may have to quickly attract people.
It does not seem like a good idea to attract investors, but the main factor influencing investor expectations is market activity, the main factor that investors react to a finished product.
If you have a super team and good advertising but the idea of the project is very weak it is difficult to succeed.