It is my understanding that

1 bitcoin = 100,000,000 satosi units

That's trillions of units.  So what is the point of bitcoingold, bitcoinsilver, bitcoincopper, litecoin etc etc.  Why is all this happening and where is the value.  It starting to look like what the Fed does with money printing. 

Forget the subject of smart contracts and lets focus just on a currency.  Why do we need anything other then just the bitcoin block chain?