Altcoins are also going down and not just bitcoin, all of the coins in the market are, but that doesn't mean that Altcoins is better to have than bitcoins. Bitcoin is still the one who owns the throne, and as of now, no altcoins could take the throne, I assumed that Bitcoin would be the number 1 for lifetime. If you are going to think of it, there are so many things that they should reconsider before they could dethroned Bitcoin.
Bitcoin is a coin where it is so complicated to compete with, it would be better if we are going to support it rather than to think of a solution to overcome its superiority against all of the Altcoins in the cryptocurrency world.