Let’s see what the Lord said:
“And this good news of the kingdom will be proclaimed throughout the world, as a testimony to all the nations; and then the end will come.” Matt 24:14
“The end” = Christ’s return.
I’ve heard plenty of people say that the whole world has already been reached by the media, but that’s nowhere near the case, despite phenomenal success in the last 100 years.
Today about 3 billion out of 7.2 billion people have not heard the gospel and in effect could not even if they wanted too. That’s 42% of people living today.
There are signs like wars, earthquakes, famines, etc., but this one sign can in no way be checked off. Of course, we cannot “jump start” Christ’s return by being more evangelistic. Still – let’s pray and then dedicate ourselves to checking it off.