Poker chasing then bluffing

like to know if you guys do this say you have in holes cards (suited or consective cards) such as say 9 10 and want to see flop then have 2 say 8 jack or 2 spades so now chasing straight or flush then make 30% bet trying to get rid of a couple people (always works) but 2 stay in then don't get nothing on next hand but still have a bunch of outs so hit it again with bigger bet (BLUFFIN OF COURSE) hoping the rest will fold but that dosnt happen so now committed and the river dosnt help now DO YOU KEEP BLUFFING OR FOLD

Source.