I'm not a theologian, but if this were to happen I don't suppose the unsaved would be able to peacefully play the prediction markets during the tribulation. It sounds bad.
The tribulation occurs 7 years after 144,000 of the most boring most devout people disappeared forever.
Are you sure you would even notice? Especially not for long.
Supernatural things won't start occurring again for 7 years, and in a fairly slow drip. Unexplained loud trumpets in the sky? Natural disasters that already occur?
This isn't an issue regarding the existence of money and markets. That still functions. Maybe even in more degenerate ways than before, which is super exciting!
Its really funny to think that some obscure ancient middle eastern sect or island nation will be the only ones to disappear in the rapture.
Its far more likely that everyone is practicing the wrong path to salvation. Given how much its been retconned just to be appealing and palatable as the religion grew, most differences between sects are arguments about the retcons, while ancestor versions of the religion are ignored and too unattractive to consider.