Whether you are rich or poor you will always have problems, so many poor despise the rich for having comfortable living and many rich youngsters despise the poor for having freedom and skills. Either way there will be problems.. just different types. Even the middle class have problems.. so therefore just be content with what you have.
There will always be that extra 100 dollars to make you happy but does money really buy happiness? No matter how much you have you will always want more. Money can never satisfy, nor can possessions. You will always want that better phone cos its got so much more functions, lighter and easier to use.. it's just that technology is growing so fast that you have to 'keep up' but think about those ppl living in the country all carefree.. they dont need much.. they are happy. But I guess people in the city are different and you can't really compare cos of the different environment and different needs. So be happy with what you've got, that's all I've got to say.