I do believe what he means by max bet is max profit per bet so it will not destroy the bankroll if OP use 1% of BR as max profit per bet. Of course anything may still happen if a lucky gambler win the max profit per bet continuesly in a row.
I think, OP can just start with what he have on his wallet. No need to force himself to provide so huge bankroll, let the bankroll increase by itself maybe by offering investment. Or he can simply use moneypot as the bankroll which will be safer for him.