If a fork happens, what is the end result for those who hold pre-fork bitcoins?  Do they then own a bitcoin on each fork?  If so, then I&#x27;d assume that the market would then determine the value of each one?  This could either cause existing bitcoin holders to have their wealth increase, decrease, or remain the same (depending on the relative market values of both forks).<p>Then if later on the two forks want to merge, what would be the technical mechanism for this?