I do believe that if you understand C, you can become a better programmer on those higher level languages. However, this is like everything in life, you don't

I do believe that if you understand C, you can become a better programmer on those higher level languages. However, this is like everything in life, you don't need to master C, or Javascript, or as the saying goes: "Too much is like not enough". Understanding how heap/stack, memory is allocated and free'd can give you a good understanding of how ruby/objective-c works. Same could be applied to Javascript and CoffeeScript.