It depends on your motive, but generally it is, yes. The main reason being that you’re able to take part of several welcome bonuses, which are usually the most valuable types of bonuses offered by casinos. In addition to this, you’ll have a wider selection of other promotional offers which you’ll often be notified about via e-mail. This is quite convenient. As bonuses are great for increasing your long term chances of winning we would personally recommend signing up with several sites.