Youtube increasing views speed?

I got a video that got view each day. There're a time it increase so fast, but now it getting slower, I wonder what cause to it? As I know video increase speed will getting faster and faster if that is a good video. Mine also, now it's almost not increasing anymore. Anyone know why and how to fix?

I assume it because engagement rate or something. With 100k above sub for instance, I think that won't be an issue. I think you should just need to add new quality content and stick on that for couple of months