In most cases, nft is now used for business and investment purposes rather than as a hobby.
To conclude these things, first we just have to look at the collection. This collection is from a company, and the company has its own vision. Also, this NFTS has lots of use-cases. And the second one, this is just art, and it's a personal art collection or might be some personal stuff. For the first reason, you already know that you are a company and you have a clear vision and mission with this collection of nfts for projects. Then, obviously, you have to market first, and if you spend your money on marketing, then the chances of success are huge. And remember, marketing should be broad and it should be a continuous process. 
 
For  personal collection:  : Well, in this case, getting success is tough because only those people who have a face value can easily get an audience, and people are investing in nfts because they think this collection is from a celeb, so maybe in the future it will give me profit also. I already mentioned in the first paragraph that it is for investment purposes only, so that they can also get a return from it. But sometimes people become famous because of their collections. People don't know him, but because of his unique collection, people are buying his or her collection. If his collection becomes popular, then more investors come to invest in it too. Though already lots of people suggest you market, I'll also give you the same suggestion if you think your launch is unique and it might be able to attract investors to your project. Then yeah, marketing should be worthwhile too. 
 
That's my overall opinion. Thank you.