The trick to trip cancellation and interruption insurance is knowing when to buy and not to buy. How much is your trip? If your trip cost just a couple of dollars, you are protecting only a small investment and it is better not to buy that insurance anymore. If you’re taking on a thousand dollar vacation, buy it. In this case, if you miss your trip for any reason, you are not left with nothing. However do not buy insurance from the individual travel provider. If the company you are travelling with goes out of business, their insurance will disappear as well.