Many here say that the main thing is marketing, but marketing is just a tool that makes you believe that you need to invest or spend money on a particular thing or service.
Markenig is a manipulation. For example, you can take a bad project with an unsuccessful product and conduct an ideal marketing company that will make people believe that the project is promising.
What do we get in the end? Nothing, cheating investors when a project fails due to a bad product. The main thing in the project is the product.
I also thing that marketing is not a main thing behind a success project. Good quality product which really necessary for people, a great community, good quality team, trust able offer and choosing couple of good quality exchange for their product are main key point for a success project. With marketing you can earn a lot of fund but at the end of the line investor will leave and your project will be vanish which we can see maximum time now days.