The listing of the twelve tribes in verses 5-8 might seem to confirm this idea. Whether the number be thought of as literal or figurative, this interpretation involves a depiction of Jewish-Christians in this world . The number 144,000, then, is almost certainly a figurative way of expressing a very large number which is complete or fixed. God's covenant of grace has now unfolded in all its multi-faceted dimensions. The beauty of the work of redemption has been disclosed.
Tribulation is part of history generally.
It has always been so, and it ever will be until Jesus Christ brings it to a close by His coming. I find it most true, that the greatest temptation out of hell is to live without temptations. If my waters should stand, they would rot. Faith is the better of the free air, and of the sharp winter storm in its face. Grace withereth without adversity.