Trendy with a select few online, I'm sure. The online world, makes certain things look great, fantastic, and trendy, but outside of there, it is anything but!
Anything online can be trendy, I could have a collection of beer cans, and have an audience for it I'm sure. I could make a ten minute video for each beer can I have, detailing the logo, the imagery, the ingredients, and so on. There would be a following, people sharing their beer cans in turn, an entire community built around beer cans.. But in the real world, most people would just laugh at it.. (I don't have a beer can collection, just an example)
Being transgender is not trendy, nor is being gay, at least not to society at large.