There are a lot of concerns you need to be aware of when travelling abroad, from the planning of the trip, to how you can keep your property secure while out of your element. Losing all of your money while overseas is definitely a risk, and the repercussions of this can be disastrous.
There are a few ways for you to gain some protection for these situations. Firstly, you have the option to get travel insurance, which will not only cover you in the event you lose your property, but also in numerous other situations as well. While dealing with the insurance companies can be onerous, this is the best protection you can have while abroad.
Another option (recommended as an additional option) for limiting your risk would be to not exchange your home currency with the host countries currency, but to instead use travellers cheques. These can be used in the same way as cash in most locations, and they can be easily claimed upon when lost or stolen.