$1,000 profit each day, he can become a millionaire if he continue being lucky like that.
If he continue to roll like this sooner or later he will bust his entire bankroll, its a matter of when his luck will dry out and if you noticed this below, he was pretty lucky to choose roll over instead of under for this bet and it is really close call there
#107390033 roll 99.7751 , Target >1.9999
Also It is not $1000 and you might want to check your math again. In less than 6 minutes (from the screenshot picture) GreyStoke made roughly 55 BTC
x $200 = $11,000 .
P.S : thats a rough count and the price currently is $230 , so he made roughly ~$12,000 in less than 6 minutes play