People strive to make money thinking it'll bring them everything. It's a wrong concept. Money can't buy happiness. It might only effect some situations and those situations might just make you happy, though it's not a universal truth. Some people would be happy having a luxury car and uncountable number of people are there who are dying not getting food. They'll be happy with just a little food. They don't understand the difference between a luxury car and a normal car. But money can buy both food and car.

So money can't buy happiness. It might only effect your situation by letting you buy food or car, and those things might make you happy, though it is not sure who'll be happy with what.

So don't run after money, run after happiness.