What's there to be cautious about? Crypto space is opened for new ideas and they are welcome at any time, we only need to figure out which project team are serious about what they introduced, ICO, IEO, DEFI all have high quality projects backing them up so new ideas are highly welcome.
New ideas mean new scam project will be created, this is the internet where it is very easy to cheat. We must always be cautious whenever and wherever. I know that new ideas are good for crypto, but we must always DYOR.