Don't worry, any Craze will go out as soon as it came...In Fortnite case I think it'll stay popular but not as crazy as it is now.
There was a similar craze with pokemon Go last year and there will be another one next year. Lets not lose our heads here. It is a good game that is getting some attention, good for them.
Totally agree~ (Never played it yet, I don't think I will because I have other priorities these days.)