$500 event, stuck in bad spot with short stack.

[Bukem_]

Hi guys, help out a cash game player please.

191 entries, 18 paid. We are at about 33 players.

1k/2k blinds, 300 ante. I'm BB with about 9500 after I post blinds.

Co probably has around 20k, old guy 35k.

CO is only weak player at table, Button is old, aggressive guy. Seems to be decent.

last orbit CO limped, Button limped. Flop KJx check check. Turn Ace check, 3k bet from old guy, CO min check raises, button insta mucks.

These were only 2 hands that saw a free flop at this table.

CO open limps, button limps, sb out, I check with K4.

Flop 89Q rainbow. checked around. Turn K. I check planning on evaluating, probably only giving action to Button since he will bluff/semibluff, though I hate my hate given this board.

CO checks, Button bets 5k. Do I just fold here given that I am probably behind? I'm not worried that he is trapping, Mostly worried about k9, Kj, K10 hands. I also think he fires here with Aj, At, A9 hands, and maybe some air once its checked to him twice.

Is CR all in correct here, or fold my little stack?

Pot is now 14.7k.