There are both advantages and disadvantages to keeping wild animals at home. First of all, it is very convenient to have an exotic animal at home. You can watch and study its behaviour right at your place. You don't need to travel far away and risk your life to see the animal. You can also always provide food for the animal and you can call a vet if the animal gets sick.
But these advantages can easily become disadvantages. For example, you can watch a wild animal at your home, but this is not a natural environment for the beast. Therefore, the animal's behaviour won't be natural either. The animal may get sick and its treatment may be very expensive. And of course, some wild animals can be very aggressive, and they may attack pets or even people. So keeping wild animals at home may be really dangerous.