Looks like after grinding a -ev game for 31,600 games he was up around 600,000 with some 6-1 martingalish system.
He took this as solid proof that he was the first person to ever develop a betting system that was capable of overcoming the house edge.
With his system, he would be making 60-70 btc a year from RHaver.
Then he lost 47 in a row and his account went from almost BTC1 to 1 bit. (which he turned into 7 before 0)
Can't blame himself, can't blame the house edge, gotta blame someone.
In the poker world we call these guys riggies. They're everywhere.
I've seen my fair share of these guys too. When they're winning they attribute it to skill, and when they're losing they attribute it to the game cheating them.
They don't seem to realize that if you play a game a million times you're quite likely to witness a one-in-a-million event.
All you can do is answer their ranting with logical verifiably true responses. They're unlikely to listen to reason but hopefully the rest of the players spectating the chat will see who is making the most sense.