When we lived in Central Thailand, and something BIG happened in Bangkok (protest, bomb, coup, etc.), we could always tell people on the homeside, "We are fine. We live very far away from where this happened." Now that we've been in Bangkok for 3 years, we now say, "This was not far from us. We go there sometimes. But we are fine."
You might think that being not far from where a bomb goes off would be frightening and unsettling, but the reality is that we and everyone around us carries on as normal. Yes, there are disturbing things happening, but life goes on. I don't want to say, "It is not a big deal" but I hardly feel like we are in great danger either.
God is our refuge and our shelter, and if something happens.... well, something happens. We can't live life in fear of all the "what if..." possibilities of what might happen. Death by road accident is actually MUCH more likely than death by bomb in Thailand, and danger from vehicular traffic is a daily threat to just about everybody in Bangkok. We are all in this world for all long as God deems that we should be here, not a minute less, and not a minute more.
And please do pray for Bangkok. The nation could use pray for a plethora of complex and long-standing problems. An occasional bombing is the symptom, not the disease.