Celebrities endorsing cryptocurrencies is no different than you announcing on your twitter feed about your latest find.
Celebrities may have more money than you, but it doesn't make them any less hungry for new experiences.
Also, you may notice the celebrities tend not to be A-list, or even B-list celebrities. That's because those clowns are beholden to their masters in Hollywood, who ultimately are beholden to their masters in the banking complex. As cryptocurrencies are a challenge to the status quo, you won't find their charges screaming about the next big thing.
And besides all that, there is no substitute for knowledge and experience. And, when it comes to your own money, no one knows better what to do with it than you.
Most crypto veterans learned this very lesson at some point in their crypto-career; never take the opinion of someone else at face value. You are just asking to be taken advantage of.
Following your heart, wisdom, and experience is the only way to success in the Wild, Wild West period of cryptocurrencies.