I know this retort is mostly used by a bunch of re-tarded teenage girls, but I feel like a big reason we see these celebrities shit on Trump is because they're jealous. Not necessarily of his wealth--a lot of them pull this kind of stunt when they have big, fancy mansions to go home to--but because he's probably the most extreme example of a celebrity regaining relevance in modern times.
Before his presidential campaign he was just like them. If you've been familiar with him since the '90s, you might have known him best for almost going bankrupt during that period. If you've been familiar with him since the '00s, you might have known him best as a reality TV star who regularly hurled insults at Rosie O'Donnell. His name was more frequently seen alongside names such as Bill Gates and Paris Hilton, other stupidly rich famous people.
Donald Trump achieved what seemed to be the impossible: go from a bit of a washed-up guy to the most relevant person on the planet. And what better way to do that than to become President of the United States of America? These other celebrities--such as Moby, Meryl Streep, Kathy Griffin, and now Johnny Depp--know that complaining about the president is bound to put them back in the spotlight, and as we've seen, they're not wrong about that.
I think the problem is that they're only thinking about how much relevance they'll regain in the short run. It's strange to me that none of them have tried to make lemonade out of lemons, you know, to seize the opportunity when they're given the chance. After Kathy Griffin did her thing, she cried about how much of a meanie Trump was to her, a stark contrast to the edgy photo shoot she did that garnered a bit of controversy, and then fucked back off into obscurity. She could have capitalized on the "joke" she made by announcing an HBO special or by upping the ante with even edgier stunts, but she didn't even bother. Same with Meryl Streep--she didn't do anything after the spotlight was on her. And all Moby does nowadays is bitch on Twitter about those pesky Republicans. He could have sold out big time by releasing an EDM single that the collective masses would eat up, but nope. That's never going to happen.
So now Depp is following in their footsteps. He made some comments about Trump that were sure to rustle some jimmies. What's he going to do now? Announce a film he's working on? Follow up with even more provocative statements? Just sit there and do nothing? I guess we'll have to stay tuned.