entropy and chaos. once stirred things tend to remain stirred-- messes tend to remain once made unless there is an effort to unmess them...(especially on a cosmic level!) billions and billions of dollars worth of gold can be found in the salt waters of the ocean- but they are so diffused and hard to extract its not currently feasible to do so...

eventually, everything will be dust, with a small percentage of all the valualbe minerals and compound diffused through out the universe...