What is the point of learning C?

Take a look at the TIOBE Programming Community Index — an indicator of the popularity of programming languages — and you'll see that Google's Go and, to a lesser extent, Dart and Perl are trending up. The venerable C, however, is a language whose popularity is plummeting, according to the index.In a world where there is huge demand for mobile and web applications coded in higher-level languages that are easy to learn and debug and difficult to make mistakes in — at least compar