I mean i need not worry about my belongings or myself right? Like how i need to be watchful in places like Bangkok?
With that attitude you should worry! No where in the world is THAT safe. Thieves and bad people are everywhere.
However, a little common sense goes a long way.
Incidentally, Bangkok isn't a particularly dangerous place for a tourist, and the most dangerous thing a tourist can do is ride a motorcycle. Several are killed every year.

