That totally depends on who you want to target.
Are you targeting slots players or BJ players or any specific game?
Are you trying to get lots of players who deposit smaller amounts or fewer players who deposit a lot more?
Are you targeting new players or experienced ones?
You can’t be all things to all players unless you are planning to build a mammoth site. So, to start, it’s better to pick one specific aspect and deal with that in detail.
If you want to expand into other areas later, you can grow that site, or add new sites, whatever business model appeals more to you.