Been traveling for many years and touch wood no bad incidents so far.

However, as lenses and camera bodies is upgraded, the value on hand increases as well and it feels like tempting fate so far.

So am wondering do you guys worry when traveling with such equipment and if so, anyone successfully bought any kinds of insurance for your equipment?

Camera gear insurance is one of the most non-profitable package for an insurance company.
I asked from several well known insurance company, they are very reluctant.

I suggest asking your insurance agent which you've been purchasing your other insurance from. (Life,medical,fire). They may be willing to sell you camera insurance since you've been using their service.