Nah! there aren't any gambling site now to provide such a huge win, the max one can win in one roll is around 110 btc.(on bitdice) correct me if i'm wrong.

There were some bigger winning than that,
BTC248 and
BTC250 in single bet!
Dude's back for more with a seemingly endless supply of BTC and the largest win the site has ever seen...

Some big bets earlier, here some of them including
BTC250 profit in 1 bet - which is probably a new record for BetKing

Brings his total profit to +257 on that account, congrats!
I guess this is proof that its very risky investing any type of bankroll on any up and coming gambling site. Same with people a large amount of deposit on any new gambling site. Any early adopter with 10000 BTC in their cold storage can easily come and clean out a gambling site completely. Look at Roger Ver or Loaded who got like 50,000-100,000 BTC to play around with back and forth.