Wrong. There would be publicity behind it - not to mention they would be able to afford good dev support to help build an awesome and long lasting coin. This should be a big deal
Celebrity sponsored cryptocurrencies are a gimmick.
Yes - they will get a lot of publicity, but then die a quick death. This is the history of the web. It's kind of like 'corporate-sponsored email', i.e. about as popular an idea as a private road. Instead of following the public highway from Paris to Berlin, people would take the "Donald Trump express" cos it has his name on it.
Except that, the Donald Trump express has no filling stations, restaurants, maintenance trucks or breakdown services on the way. That's the Bitcoin infrastructure that you don't get (and will never get) with any alt coin.
Celebrity backed "coins" are second class merchandise in the cryptocurrency world and half of the market won't touch them for this reason.