I don't think a casino exists that doesn't have some limits set in play. [...] they make their money from the -EV gambler's take on.
You might be surprised to hear there's a new dice site with NO limit to the bet size, and NO house edge (until the end of the month):
0% house edge till ( 1-June-2015 )
We don't have any maximum bet limits or deposit / withdraw limits
Unbelievable?
They claim to have a 5-figure amount of BTC available to back their bets, but apparently don't intend to prove it until after the 0% edge offer expires:
We will provide our cold storage wallet in few days.
Interesting stuff, no?