Approaching an all-in BB, how good of hand do you need?

[Abagadro]

Live MTT, down to 15 people (8 on my table, 7 on the other). Top 10 get paid (but good money is in 1-5 as 5-10 basically get your buy-in back and maybe a little extra). In this tourney, the blinds at this point are rediculously high compared to the stacks. Except for maybe 1 or 2 stacks, a call of the BB is all in. As a result, bubble tightness has seriously set in. I am UTG+2 and have the exact amount of a BB.

I hold A5o. Is this worth a call in the hopes that I am going up against the ramdom hand in the BB? Should I wait to see two more hands plus my forced bet on the BB if nothing worth playing shows up?

I've consistently made the final table in this tourney by being very tight, which means I am usually very short once I am there and get the little money as the blinds are so huge, so I am trying to ramp up my aggression to try to get into the bigger money.