1 Thessalonians 4:16-18 is the only scripture i can see that speaks of any one going with out dieing, so based on that i do not believe in a rapture of that sort at all, admitting at the same time that i do not know.
As far as being the firstfruits, i believe we are almost 2000 years late for that.
Jesus said i will raise you up at the last day.
1 cor 15
23 But every man in his own order: Christ the firstfruits; afterward they that are Christ’s at his coming.
We will be Christs at his coming, if we are his, so we could not be the firstfruits.
We will be Christs at his coming, if we are his, so we could not be the first fruits.5
The harvest does not end until the Fall Feasts. The Metaphor of First Fruits is to identify
shalom b'SHEM Yah'shua HaMashiach
the beginning of the harvest.
The apostles who stood by Jesus’s side couldn’t get it right. Why should anyone else presume so? Jesus tells us not to be concerned about selfish matters and urges us on to help others toward Him.