Live gamble or not

Live small buy-in tournament started with 125. 13 left. We were all in money.You need to be in 5th to get more than $500.1st was $5000.I had 30k. average was less than 20k.My table has 7 player. One had more than 50K,one had little more than mine and two had around 20k and two had less than 10k.I did not check another table but probably I was 5th at that time.Blind was 1500 3000 ante was 500.Everybody plays tight,so almost every pot was taken no contest.Villan had not played hand for about 2 orbit since I joined the table.had 18k chip.At UTG+1 he all-in.I was at UTG+2 I had AKs.SB and BB was short stackers.Player with 50k at the button.I had Ok stack however I did not have much time due to blind and ante.Should I all-in or fold?

[Rduke55]

Push!