What would you suggest instead? Until there is something that is as general purpose as C++ and has the same level of performance it will continue to survive.
Assuming Rust 1.0 is released sometime this year, it'll still take a number of years before Rust even begins to offer the very wide range of libraries/frameworks that are available to C++ developers.
Interfacing with these existing C++ libraries/frameworks may speed things up, but at that point its disputable whether it's really Rust being used.
Rust may be among the most promising alternatives, but it's just not there yet, and won't be for some time.