Usually I tighten up around the bubble (like most players do), but occasionally, I'll vary with some looser plays if the situation calls for it. You can sometimes exploit others playing nitty around the bubble, but I would only exploit this in select spots: otherwise we are too loose and vulnerable ourselves.
It also depends on how much you want to make it into the bubble. If the prize is that much of an incentive for you, then by all means tighten up, but if the "real prizes" are at the top of that payout structure, then it may be worth risking to bust outside of the bubble to accumulate more chips to propel you towards the final table/winning the event. Being near the bubble can be a great time to earn chips to make a run at the end if the situation is there and you are keen to pick up on it.
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