You can usually find a table with a limit of tens of thousands of pounds. You can also find dedicated VIP and special tables, where the ceiling is even higher. What's more, when you're betting a lot of money, it's more fun to play with real dealers.
Roulette has always been popular because of its simplicity. This is a purely opportunity-based game that allows players to spin wheels and collect expenses (if any) without worrying about any strategy.