You cannot be the only game in town anymore.
There is no exclusivity when it comes to your line of work.
You want to be the only one with the idea? Good luck. There are lots of people trying lots of things. Ideas happen.
I remember back when you could still get one- or two-word domain names. I don’t know the official number, and certainly you can get creative with your naming, but if you’re looking for a .com to set up shop, better get creative with your spelling or naming.
You can wish away competition and copycats, but time is better spent standing out from the field rather than lamenting that it’s getting crowded there on the lawn.