Oh yes we can. Bitcoingold, Bitcoinsilver. We can fork this stuff till hell freezes over and that is a big hole in the system.
Now we know why the forked altcoins never die! Bitcoin Gold is worth US$300 now... The MO is to bribe the current coin holders with new coins, and keep inflating.
The more supply of coins in future, the lower their price will have to be to be useful to the elites, and the less embarrassing to the dollar. (Current coin holders will do OK as long as they hold on to their forked coins.)