Big blind , play or fold?

[chezlaw]

Paradise $300 - 40 places play

I'm a novice at tournies and at no limit play but I've staggered into the money. Currently 37 left blinds 1200/600 ante 75

My big blind with K4o. started with T3700 so if I fold I have T2425 and will be 36th or 37th.

Payment stucture is very flat. Small step up in money at 30th and need to get to 20th before it steps up again and gets serious.

5 folds and then a raise to 3000, folded to me. Raiser started with 20,000 and is capable of stealing.

Becuase of the flat payment structure the game has become very lively and I thought I had a better chance of making it to more money by playing this HU pot then getting shorter stacked and hoping for a better chance so I went all-in with K4o

Wondered if I've got this right or should I wait for a better chance.

Thanks

chez