It's general advice, but I think you may be lacking opportunities to work with python. And it's understandable, there are times when we don't have any interesting projects going on, and it comes to our mind that certain language doesn't have a future. I think you need to go all out in searching for interesting projects and it will change your perspective.
Saying Python doesn't have a future is a very bold statement, and I don't think it's true. Just check the latest Stack Overflow Developer Survey. Especially in the data processing world of programming I see a lot of tracktion about Python. As someone who is currently learning both Go and Rust I think both of them would be a good choice. Which one you should pick? It depends of your interest and the things you want to build.
Are you searching for a memory safe, non GC language with a lot of functional programming feature? Then Rust is your choice. Are you searching for a language which has a relatively small learning curve or are you interested in the Cloud Native world? You are a programmer who doesn't want to think a lot about memory management? Then Go is your choice.