Villain is unknown (2nd hand).

Is it ok to fold when missed and stack off when hit?

I'm nowhere near this level but I'd say no. Calling and playing fit or fold I doubt is +EV. I'd be folding I think vs unknown pre. At my steaks though cold 4 bet is very strong. Probably different at NL50.

Given positions and the fact that it is an unknown cold 4betting from the SB at zoom, I think we can get away from this pre. Not happy about any option really but it seems best. As played when he bets that ridiculous size on the flop I don't mind a fold. If he bet smaller I would call and see a turn.

Fold pre or shove. If it's some semi-unknown with reasonable stats over 30 hands I would fold. Against a total unknown I shove. Big enough possibility it's some aggrotard w A7o or whatnot.

Let's say there are 1/30 players that are total maniacs and will cold 4 bet 30% of time.
Now somebody cold 4 bets that is done by the rest of the player pool mostly with AA-KK at these stakes. You get AA KK less than 1/100 hands dealt (and obviously we even block those).

Even though there are only 1/30 maniacs like this, the possibility of this player being a maniac is something like 50%. Obviously the percentages are just out of my hat, but in principle the chances are he is more likely to be light there than if he was somebody you had 20-30 hands on.

^ what?

Fold pre. Its not a big enough possibility that its an aggro tard actually.

He's hardly unknown when he makes it this ridiculous sizing.

Fold pre. Could get behind a shove as well but calling seems pretty bad.

calling the cold 4bet isn't bad

Assuming an A or K will always be good, we're just about getting a good enough price. But given that it won't always be enough to win (AA KK or AK) and we're putting in around a 3rd of our stack and then folding what could be the best hand on the flop, I'd rather just fold pre.

We're not putting in a third of our stack, you don't count the money already in the pot. We're putting around 22% of what's left of our stack. And it doesn't really matter.

Villain can give up on the flop.

It might be best to fold but calling the 4bet isn't bad.

That's true.

Yeah I guess bad is not the right word for it. But I do think flatting is the worst of the 3 options pre.

flatting and folding ~any flop is pretty bad though

this

Things to consider here.
We have blockers to AAKK.
We've 3b otb.
Villain has made a huge cold 4b
Villain has made an even more gigantic cbet.
We have no hands on villain.

Not a huge % of player pool cold 4b bluffs. I did a lot and would get into ridiculous spots with other likeminded maniacs where cold 4b of TT & 99 was a value bet etc. I also had a way more standard 30-40% cb sizing.

The reason I bring the above up is if a reg is going to be doing it often and light they going to have to have a more standard sizing to be able to bet bluffs etc. Our villain doesn't which leads us to conclude they are inexperienced in this spot. If they aren't in this spot often it's then likely value abd we can exploit fold preflop etc and play well vs them in future

i would 5bet shove if i think he has at least QQ+,AK in his range otherwise i would fold
i think calling is the worst option. I expect him to Cbet 90% of the time, so we have to fold 2/3 of the time when we miss. When we hit we're way behind against AA,KK or don't get much value from QQ,JJ

Exploit him and fold pre.