Yeah. A bookie’s goal is to have enough bets on either side in such a way that your liability exactly matches your asset, per event, and make money only on your commission. But that is not to say a bookie would not notice you winning 5 times in a row. Especially if you keep hitting the long shots.
A bigger problem is, if you bet on a real long shot, and the bookie thinks that could never happen, so he stupidly takes your bet naked. (meaning, without enough bets to cover the other side.) You could theoretically bankrupt a bookie, if you 're unlucky? Not only the bookie probably wouldn’t pay you, the word is gonna spread real quick that you hit on a 64-to-1 shot for $5000, and cleaned out a bookie. They’ll soon know who you are.
So you need to bet small enough to escape detection… it might be impossible to make your billions needed to own the world and rule as the king.