I wouldn’t call an 8% drop “downfall”. I think it will shrink and grow over time, but I expect the growth pattern will be in waves - migrations of people coming in response to changes in Reddit or other causes, followed by periods of retraction as some people lose interest or decide it’s not for them.
From my feeling, it seems pretty steady at the moment. I wouldn’t mind if it got bigger, especially to make some more niche communities possible. But I’m not worried about it.