WOW some one lost today 120 BTC on dicebet
Sure, can you show us your wallet with a signed message and that amount? How were you going to pay 120 btcs if that person had won?
It's very unlikely that anyone lose 120 BTC there. It's the site owner playing on his own site to trick people into thinking it's a real dice site.
Yesterday after AKCoinMiner had played large amounts on several legit dice sites, an account called "AKDiceMiner" was betting 50 BTC at a time on DiceBet. AKCoinMiner himself denied that it was really him - just another case of DiceBet trying to make itself look busy.
Most recently the site owner has been live-streaming himself playing the site for large amounts, pretending to be a satisfied customer.
Avoid at all costs.
Edit: manl from DB just showed me this. ffs.

Note that top bet... 25 BTC at 90x multiplier. That would be a profit of 2225 BTC if it won, and would require a bankroll of around 200k BTC to safely offer.
Edit2: seems I said that last bit before... ho hum.