I'll be very honest and blunt!
I RARELY ever win RM 1000 or more at my local Asian casinos and I can't even win any sufficient amount at any non-Asian casinos nowadays (last big wins were back in 2013/2014)!
Every time I win around RM 500 or a bit more, I would quickly make a withdrawal, but leaving behind at least RM 100 to continue playing.
On exceptional days (there's been a few of these over the years), I could make 2 or 3 withdrawals in the same day, totalling to just over RM 1000, so that's about the best I've ever gotten till now.