If most money is flowing from poor to rich, then most people are becoming poorer. Where does it end? My best guesses are dying in poverty, neo-slavery or revolution. Or massive financial collapse followed by economic reboot. That scenario probably ends up with the formerly-rich owning more land, goods and companies than ever before, just because they know how to take advantage of those situations. The only rich who would suffer much through the destruction of a whole currency are those with mainly virtual assets: the entire financial sector. Anyone who owns buildings, land, companies and in-demand goods would probably come out of it just fine, though they might suffer a bit in the short term.
Mokalus of Borg
PS - "Suffer" is, of course, a relative term.
PPS - As are "rich" and "poor".