Yes. Big fears. I can see many potential problems. They need clever people, much more specialized than I (you?) working on them.
Currently the main 'solution' to these problems seems to be "let people die". I think it shows a fundamental lack of creativity. And, more personally, not just "let people die" but "my loved ones must die" to enact this solution.
So yes, worried. I hold the current set of solutions in contempt. Nevermind all the other problems (financial and moral) that could be tackled by delaying the degeneration of the elderly.