A domestic player will find it difficult to stand up to the assault of a global competitor. In this case, the best defense really is a good offense. Get out there and go global before a foreign competitor steals or marginalizes your business. And there are some other very good reasons for going global. Not only will you expand your market, but you will access a diverse revenue stream which is more stable since you will no longer be as vulnerable to periodic downturns in any one economy.
Global companies outperform domestics, growing twice as fast with significantly higher returns.
So going global in your ecommerce efforts makes good sense, but with the understanding that serious thought and preparation are required. They don't research foreign markets, perform due diligence on foreign partners, protect their intellectual property or understand the customer culture of their overseas operations. They create partnerships that don't work and must be renegotiated or terminated. All of these mistakes take time to rectify and cost money. Some of them cannot be undone.