A lot of new projects appear every day and investors have a big choice of different projects.
Now competition between cryptocurrency projects is so high that it is necessary to have strong promotion to pay attention of users.
Don't go much with new projects confidently.
Not all of them are worth taking your investment with but if you do. You have to take time and get as many details as you can. Also, promotion is really good for the part of the project.
But that doesn't mean that the project itself is also good just because it has a good way of promoting it. Don't rely too much with their promotions because it's common marketing for projects.