There are many great comments herein about wealth, what to do with it in this life, spiritual wealth, karma etc.
But to directly answer your question, yontenjamyang whether "In buddhism we believe we have future lifes. The question is can we bring our money to our future lifes? If can; how? If not; why?"
To my knowledge, no, we cannot bring our money into our future lives, because it is a physical item. We can't even bring our bodies into the future lives, how are we to bring money into our future lives. At the point of death, there is nothing that can control us but our karma. Which brings us to the topic of impermanence, that we lose everything that we have in our lives, EXCEPT what we have imprinted within our mindstream. With or without money, I feel that money is what we perceive it to be. Yes, of course we cannot surivive without money, but it is not a guiding factor in our lives. With or without material wealth, people still survive - just compare the poor and the rich. Live goes on, but ultimately, we choose the happiness that our mind allows us to.
I guess it is not so much about bringing wealth to future lives, butmore so the methods and qualities needed to bring you to that state of wellbeing again in your future lives. Once you have those qualities imprinted within your consciousness, it will be triggered again in your future lives. Whether you are born poor or rich, it is these qualities imprinted within your consciousness that will guide you to lead a life of richness or a life of being poor (and poor can be subjective, even if you have alot of money).