Investors are not tired of ICOs ,it is just that people are tired of joining take ICO or those without good potentials. We still have some good ICO with potentials that investors still rush to invest in
That's right and the majority of them are still aiming to get quick bucks as much as possible. Remember they will always try to rush any promising ico to get the fast money like what they have done it through gonetwork, metronome and many more. They will always be doing it anytime.
About goting tired, i dont really know but maybe mkst of beginner will not try to start in ico anymore but most of them perefer to look into trading. Long or short trading and maybe day trading. For me both are very good so i will not try to make one decision.