If you are planning on relocating to Portugal, then learning Portuguese is crucial, unless you want to live in an “expat bubble” and not integrate, or have no wish to understand anything about the society in which you are living.

To rely on other people to do things for you is also very annoying and frustrating, and in the unfortunate event of an emergency occurring, it could be dangerous or even life threatening if you can’t speak Portuguese.  Learning the language can also help prevent you from being taken advantage of.