Forking Inflation?

Someone please explain to me how forking a coin is different from Keynesian Inflation. In every fork a large portion of the coins are not exchanged. Leaving the additional coins on the table is losing out on the more complete portion of the present value. The main chain has been reduced value for the same number of coins in the network, since the underlying network has been reduced of value the new value of your old coins is less. That's why you need to hold the keys for the forked coin so you retain the complete value of the network. Redeem your new coins when the network stabilizes.