Since most of the major altcoins move up or down at the same time as bitcoin, aren't they all controlled? How does it work?
I believe that it's just correlated with Bitcoin. As you can also see that Bitcoin's dominance against all altcoins is extremely high, so what's to expect? Expect that it will be the common price action of most of the altcoins.
Some actions could be, after Bitcoin pumps, altcoin follows. And once Bitcoin go for sideways, most of the time altcoins will pump.