Yes, you can start playing at a new casino without giving up on your old online casino. No law says you can only play at one online casino at a time. You can create an account in as many online casinos as you want. This gives you variety and more chances to win money. On top of that, if you create an account with a sister casino, you may get special treatment for being a loyal member. However, keep in mind that you cannot make multiple accounts in a single casino. If you have more than one account at the same casino, you run the risk of getting all your wins confiscated and your account terminated.