In theory, there's logic to the quantum threat that everyone's worried about lately.

But keep in mind – if 128/256-bit entropy ever becomes vulnerable in the future, there will be a ton of problems and questions. Probably, as technology advances, the same progress will be used for protection in parallel.

On the software side, short version:

always stay vigilant about what you use, where you click and what you install. Open-source clients are preferable,

and that fear of potential leaks is actually super useful – it keeps you safe.