Hand @ 3/6 full kill - strategy question

[vhuntd]

Playing 3/6 full kill game @ Trump indiana. Structure is that if one player wins two pots in a row, he posts $6 on the next hand while the blinds stay @ $1 and $3. Then the game plays like a 6-12.

If the killer wins again, same deal - he posts $6 and it's a 6-12.
Up till now, all the kill pots have been 3-4 handed and unraised.

So we're at normal 3/6 and I win a pot. Next hand, we're still 3/6 and I'm the cutoff w/ KT off. Folded to me with 3 tight passive players behind me.
Should I raise it up or fold it? If I win then I have to post $6 in the next pot as a kill.