Anecdotally, I see a decline of JW membership and activity (I am in the US). The WT membership/publisher figures for the US are relatively flat in recent years, generally holding steady. But that doesn't jive with my own personal observations. Several congregations within my sphere of observations have closed, the KH sold, and the JWs merged with other congregations, with no apparent increase in attendance at those congregations. And the conventions are emptier-looking than I have ever seen. They try to spin it as having fewer congregations assigned to that particular convention, but I don't buy it. The WT is driven primarily by the dollar; they wouldn't pay to rent a large facility like that unless they expected to have it filled-to-the-brim with donating JWs.
That being said, other countries are reporting increases, some quite large. I spoke with a JW bethel member in an African country, and yes, they do have conventions with 700 baptised and have people on a waiting list to get bible studies. But the whole country's per capita income is something like $100 a year.
My take is that in the developed countries, the JW religion is in a death spiral. In third world countries they will have continued growth for a while, probably some decades.