I think i will buy 3080 Rtx and when Rtx 3090 will launch i will sell 3080 and buy 3090
I get that it's your money, but that just seems economically and environmentally irresponsible.
As Steve from GN puts it, don't just buy it because it is Shiney and new. Buy it if it will make a noticeable difference in the games you play NOW.