well no one is stopping anyone from emigrating to Europe, but those countries might not be so open to immigrants especially Asians.
Japan is an alternative but the society is stressful and again is not open to immigrants. Also, u got to master the langugage well to survive there (unless u are 'white' else you'll be seen as a Japanese everywhere u go)
Anglo country is attractive because of its open policy to immigrants, relaxed lifestyle, developed infrastructure & legal system,established education & healthcare system,stable government, open space, freedom of speech, and heaps of beautiful places to visit. I find that Sporeans with very strong chinese roots and values might not blend in the western society.