How can people run out of idea? Most ICOs are about using, enhancing, and integrating technology in our daily lives. Our current technology is not yet fully developed and people are endlessly seeking to improve technology and our daily lives. So, I doubt if people will run out of ideas and ICOs will end.
You have a point there but we are still humans we have a limit, someday sooner or later we will be tired and run out of Ideas this is inevitable
Maybe that will take 2 years, or 5, but I think likely it will take longer because some of these new ideas will spur new ideas and the cycle will go on. EOS and Cardano wouldn't have been created if it weren't for Ethereum and I am sure there are other examples out there like this one; leading me to believe we will have 10 years + of constant innovation. I don't believe the raises will be as big though, I believe they will become more nominal and humble in their asks.