Hype will not last long because it is going to fade and other projects will get the hype that you were once getting hence you shouldn't be depending on hype to invest into a project.
You can say that the hype starts the project, but the fundamentals keep the project going. The hype becomes part of the fundamentals. The hype for a project is good, but the bad side is that you can never know when a hype is organic or when it has been falsely and inorganically generated by the company behind the coin. That is why the hype is never really trusted, and most people investing in new projects based on hype are taking a gamble. If you are not comfortable investing in new projects based on hype, you can wait for the fundamentals.
Or better yet, keep your funds in solid projects such as the long running ones which are included in the top 20 coins. Most new projects driven by hype are usually short-lived, meaning, if you haven't caught its peak to sell, you will likely end up holding bag of useless coins or tokens.
Some of the features that you need to consider when you are looking for more long-term projects -
> actual developers (as much as possible they are not anonymous, quite easy to exit if it is anon proj)
> have actual product/service - with considerable number of active users, with actual usage, it can sustain the existence of the project
> presence in the market - is it known or not? also in the trading market - is it available in most trading platforms?