No, I guess it's part of the normal betting technique.
In general, the first indication that someone likes something excessively is from the topic of conversation that is always thrown at everyone. I honestly can't read the signs of addiction physically. Someone who has been difficult to get out of the gambling circle will rarely be seen in the social sphere because all day long at the gambling table or monitor screen.

The only sure signs that can only be read and studied are the stories of those who have managed to overcome addiction.