I've been here for years and I can say that following the hype never works for investors, this is simply an advise.
Few examples: Synereo, Savedroid, Electroneum.
Even though these projects managed to get the money they needed and much more, they still didn't manage to deliver what they promised. Or in some cases, not even get listed in decent exchanges or give ROI back.
Cryptocurrencies are not going anywhere and there will be more and more ICOs until these things get regulated (maybe years from now). So If you're an investor and you don't want to stupidly lose your money in the process, I highly suggest everyone to start researching about the projects he's interested in instead of taking his decisions based on Tweets from McAfee, press releases, scores in Icobench, etc.
Sometimes, we come up with a loss in our decisions on what to invest but of course riding the hype while it's fresh has a positive impact on our money. However, just like what you said that some of the projects does not meet what they promised in the first place. So for instances like this, we should consider another option and invest on coins which is already in thearket and avoid ICO projects instead.