well i won't say generally that it is risky to invest in new projects , but what i would rather say is for you to carry out your research and know the project you are investing in .there are still a few good new projects you can invest in if you take your time to research about them.
There is no one that does not know that these new altcoins have more risks, but they will always want to invest i them, because they bring in more profit, most especially on short term basis, because they can make more profits from them, than the already established coins. Themore the risk, the higher the profit and the lesser the risk, the lesser the profit. It is always directly proportional.