I have a buddy in Taiwan that makes a pretty good living teaching English as a second language.  He should probably keep his ears open for the possibility of another career.  I say ears because the device that may put him and other language teachers out of a job is

Let’s face it: businesses that have a poor or non-existent digital presence are invisible to a large clientele, and as a business owner without a strong online foothold you may lose out on possible future sales and loyal customers. A critical factor in the success of many businesses is through presentation, which can be achieved via personal branding and social media. For small businesses and entrepreneurs, a strong digital presence is even more important.