There is a question asked in Revelation concerning who will stand when the wrath of God comes:
Rev 6:16 and they say to the mountains and to the rocks, Fall on us, and hide us from the face of him that sitteth on the throne, and from the wrath of the Lamb:
Rev 6:17 for the great day of their wrath is come; and who is able to stand?
The answer given is in the next chapter.
144,000 who what?
Rev 7:14 And I say unto him, My lord, thou knowest. And he said to me, These are they that come of the great tribulation, and they washed their robes, and made them white in the blood of the Lamb.
We see at the end that the land beast makes a mark:
Rev 13:15 And it was given unto him to give breath to it, even to the image to the beast, that the image of the beast should both speak, and cause that as many as should not worship the image of the beast should be killed.
Rev 13:16 And he causeth all, the small and the great, and the rich and the poor, and the free and the bond, that there be given them a mark on their right hand, or upon their forehead;
Rev 13:17 and that no man should be able to buy or to sell, save he that hath the mark, even the name of the beast or the number of his name.
We also see a warning about this mark:
Rev 14:9 And another angel, a third, followed them, saying with a great voice, If any man worshippeth the beast and his image, and receiveth a mark on his forehead, or upon his hand,
Rev 14:10 he also shall drink of the wine of the wrath of God, which is prepared unmixed in the cup of his anger; and he shall be tormented with fire and brimstone in the presence of the holy angels, and in the presence of the Lamb:
Rev 14:11 and the smoke of their torment goeth up for ever and ever; and they have no rest day and night, they that worship the beast and his image, and whoso receiveth the mark of his name.
Rev 14:12 Here is the patience of the saints, they that keep the commandments of God, and the faith of Jesus.
So we have a people on the earth who give warning who are these people?
notice the 144,000 at the start of the chapter. and notice this:
Rev 14:13 And I heard the voice from heaven saying, Write, Blessed are the dead who die in the Lord from henceforth: yea, saith the Spirit, that they may rest from their labors; for their works follow with them.
So a warning message is given and then some shall die who are these?
Rev 20:4 And I saw thrones, and they sat upon them, and judgment was given unto them: and I saw the souls of them that had been beheaded for the testimony of Jesus, and for the word of God, and such as worshipped not the beast, neither his image, and received not the mark upon their forehead and upon their hand; and they lived, and reigned with Christ a thousand years.
These are those who testify of Jesus and the word of God. So clearly during this time there will be Gods people on the earth.
144,000 are the ones who stand through the wrath of God and they are the ones who give the warning and then Gods wrath is poured out while they are there cause its not till after this that the coming of the Lord happens.
Rev 14:1-5 144,000 who give a message to the world.
Rev 14: 6-13 The three messages the 144,000 give.
Rev 14: 14-20 the coming of Christ and the wrath of God.