It is meant as a warning so that people can prepare by coming to Christ for salvation and being counted as worthy to escape what is coming on the earth.
God has done us the favor of telling us ahead of time about the judgment He is going to send on this earth. Many people are saved after hearing about the details of how this age is going to end.
It's not just for those who will be here during the Tribulation.
Agree! I know that some of this end times stuff helped in leading me to Christ. Of course, first I was broken about my sin and realized I needed a savior. All of God’s Holy Words have relevance to us for a host of reasons.