5BTC per field (or to be more accurate per single type of bet, every stack of chips you place has their own max win),
I'm just confused by this bit. On a bet like this:

I get that the limit is 5
BTC win for the single on 23.
Is the limit for the 4 corner bets all covering 23 combined to total 5
BTC or 5
BTC for each bet?