I put all my chips in here. If he has been supper aggressive you probably have the best hand or a coin flip. It's early, you have a chance to double up or get out before too much time is invested. Like I have said in another post, people don't factor in time spent enough. it's much much better to go out in the first hand then on the bubble. I'll take a chance early if I think I have a coin flip or the best hand. Here, there are only 4
hands that you don't want to see, AK, QQ, KK or AA. Everything else is good. All other pairs you are a toss up and all other non paired hands you are a big favorite. Overall that's better than 50%. I instant raise all-in against someone that's obviously a Donk. And seriously how can he be anything else but a Donk pushing all-in UTG with, what? $45 in the pot.
Also remember that he is going to keep playing this way so somebody is going to get his chips, do you expect to get a better hand soon? before someone else does. Better you get his chips then somebody else.