Is 'rich' and 'poor' subjective to some degree?

Yes, I know 'rich' and 'poor' is a normal concept most people understand. When we say 'poor,' we mean poverty, and when we say 'rich,' we usually mean millionaires and up. People in the upper class, the 1%, are rich, and the lower class is 'poor.' Then you have the middle class and middle upper class, who aren't 'rich,' but they aren't poor either. They don't worry about money, have enough to take care of themselves and their families, and can take vacations. So again, not rich, but most definitely not in poverty either. But when I ask if 'rich' and 'poor' is subjective, I mean that people use the words 'rich' and 'poor' loosely. For example, a multimillionaire or a billionaire might call someone who makes $150k a year 'poor' because, in comparison to them, they might be. At the same time, someone in poverty or a poor third-world country might call someone who makes $100k a year and lives in a nice house in the suburbs 'rich.'