Trading is Not dying and will never.
Come Trading Platform May but trading is not going to die
If you could check each and every coin few coins are still has a lot volume buy and sell.
its just the time of which coin is actually moving people move there.
There are so many coins which is moving all the time LTC, XPM, NMC, MEC, PPC, FTC and so on..... are still trading in a lot volume
When price moves up of course ALT's goes down and when mining gives supply Price fall
Bitcoin price moving Up is driving ALT's price down and it is temporal.