No guy puts 500 btc in a gambing site.
That guy did. I'm the only one who knows the site secrets, and I've not told him. I temporarily froze his account after the first bet thinking it must be a hacker taking over his account, but he was able to prove it was really him, so I released the funds and he continued betting.
I promise you these were real bets. Plural. He bet 497.14723423 BTC @ 93% twice winning 32.07401559 BTC each time, and 561.29526541 BTC @ 98% once, winning 5.72750179 BTC.
See details here:
1. https://just-dice.com/roll/6966857
2. https://just-dice.com/roll/7079332
3. https://just-dice.com/roll/7093577