Replacement of Money

Througout history a lot of different monetary currencies that have been used by people all over the world. It all started with trading of poultry or food in general for services rendered until it reached the time where coins where made. During that time all coins were really made with gold, silver and other metals. Now we have coins and bills. I dont think that what we have now will change anytime soon. I'm sure whatever they think of next will definitely be very similar to money now since it has worked for us for so many centuries already.