I don't think that trading volume is the most important factor. The most important ones for a new project for me are the team, the roadmap, the use-case of the project and also the tokenomics. The trading volume is also not that unimportant though. When you are exclusively talking about very new projects like projects that have just launched on that day, then i think most of those projects will have a decent volume if they were able to create a minimum of awareness and interest for their token.
Projects that are on the market for a little longer but still very small can be different though. There are a lot of projects out there that have trading volumes of a few hundred dollars a day. This is a very bad sign in my opinion and i would not invest in such projects because they are almost dead and a id size sell or buy order would probably mess up the price.