My opinion about art

First of all, I don't know anything about art and how can be too much expensive.

I will talk about the most expensive painting of 2014. This painting has sold for 87 million of dollars. HOW? I can't understand it, how can they pay 87 millions for this. I can't understand paint is difficult but really, why are you paying this money for conceptual art, of course I don't know anything about art but why that money you can live the rest of your live very rich. It's a painting of 1969 and it's composed of 4 colors, that's the only what can I see. It don't represents anything for me, maybe it's because I think art is overrated.