It is important to know that for any project hoping to convince investors into putting their money into the project, they are going to be focused on making the project as appealing as possible which means that the project's whitepaper will surely be good so I believe you should look beyond the projects whitepaper to decide if a project is legit or not.
Always make through research of a project's team, road map and token metrics to decide which projects to invest in
When I analyse any project I assume that all the information I am getting is false unless I can confirm it from independent third party sources. You should always remember that the whitepaper has been written for one purpose only. To convince people to invest time and money into the project. At best they will always promote the positive and try to diminish the negative, at worst they will be nothing more than a carefully contructed web of lies designed to part you from your money. Be sceptical at all times.