It's nothing to do with the number of units.
That's trillions of units. So what is the point of bitcoingold, bitcoinsilver, bitcoincopper, litecoin etc etc.
They alter Bitcoin's consensus rules or other aspects of its system. For example, Litecoin has a decreased block time of 2.5 minutes, increasing its potential capacity for transactions (though some people can be concerned about the security of this method of increasing capacity).
"Bitcoin Silver" and "Bitcoin Copper" are bullshit and "Bitcoin Gold" is extremely shady (arguably a scam).
It starting to look like what the Fed does with money printing.
These are not Bitcoin, so no one is "printing" more BTC. They're only worth something if the market decides that they are.