A bank transfer is also very easy, because everybody is familiar with internet banking today. It is safe and gives a familiar feeling.
The biggest disadvantage of bank transfer is that it is somewhat impractical because you must first log in to your bank, fill out all the information, verify everything and so it takes some time.
Also, a bank transfer takes a number of days on average, which means that your casino play money will only be visible in your account after a few days.
As a rule, 3 to 5 days will go over and the casino will inform you that the payment has been successful and the amount has been credited.