I believe that people exchanged their alts to bitcoin. That is why altcoins are pretty low, but bitcoin is expensive. After1 august main altcoin prices will start jumping when people understand that there is no meaning to escape from altcoins.
that is going to be very interesting to see.... i think everyone keeps on saying that majority of altcoins depends on BTC but after the fork we might see something very different. i hope that only good projects boom while BTC goes down and not all the shitcoins in general after 1st august