Why investing on new project? If there's already exist on the market like trusted coin for a newbie you must learn the market so well just try to invest on the top 5 of the coinmarketcap while investing on it and learning step by step you will know the process and if you want to invest on new coin then you have an idea.
maybe they want to get a big profit, from that they invest in new projects, if investing in old coins in my opinion also takes a long time also to take large profits, sometimes new projects in a short time can generate many benefits if the project runs with good