Generally, I think Bangkok is such a safe place but of course you really have to be responsible enough for your own things. You can actually bring your laptop or any gadget but I suggest if you will go to crowded places make sure to always watch out for your things. Be attentive all the time and please always read some reviews online so you will get an idea, here's one http://bangkok.klapsons.com/getting-around-bangkok/ -- if it's not permitted to post a link please delete it.