if you want to teach english in a safe environment I would say do it in Singapore. It's a country with a safe security and frankly the people there don't know how to speak good English. You should go there in teach them how to talk properly instead of using Singlish which is really appalling.
The Philippines is looking now for native English speakers to teach. There are other countries but I know they specifically are not concerned about a degree. It goes without saying that you would have to do some learning yourself. They want the right accent and to learn to really speak as people speak. . . . . . . . . . .. I watch only news from other countries and have been doing so for years now - commercial free TV and news and education. Use the link below. This is where I found that out. There was a 30 minute special on the need and desire for English teachers.
I'm sure you can find a good job in China,many people here are learning English,like me...
Can you teach me English?I will be thankful.
Wherever you go you will need some sort of qualification, that is what most countries require, and even a basic TESL certificate is a start. And don't forget you will need a job offer first and then apply for a work visa.
What countries you can go to depend on your citizenship and qualifications. Some countries require degree level qualifications to teach English; other have no visas at all.
Australia
Iran for its universities and high english classes