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 have scammed investors many times already, last year a new crowdfunding strategy was released and many expected a very good result but it end up a scam, the name of this crowdfunding project is IMO, this scammers later introduce blockburn another scam project that failed to pay bounty hunters till today, be cautious about new ideas, not all of them have good intentions.