I believe in partial rapture.
Partial rapture is where those in Rev. 3.10 are raptured before the Tribulation IF "thou didst keep the word of my patience, I also will keep thee from the hour of trial, that hour which is to come upon the whole world, to try them that dwell upon the earth."
Luke 21.36 agrees, "Watch ye therefore, and pray always, that ye may be accounted worthy to escape all these things that shall come to pass, and to stand before the Son of man."
And so does Matt. 24.40-42: "Two women shall be grinding at the mill; the one shall be taken, and the other left. Watch therefore: for ye know not what hour your Lord doth come."
So not all Christians will be raptured before the Tribulation. Only those who "keep the Word of His patience," who "pray always" and "watch therefore" will be received up "before the throne" (Rev. 7.9) in 3rd heaven, before the 1st trumpet (8.7) of the 7 trumpets of the Tribulation spanning 7 years.
This is a condition for all Christians to heed. We are saved according to grace, but we are raptured beforehand according to works and keeping the conduct of Matt. 5-7. This is accountability for Christians so we need to reject antinomianism.