We can't say that this is the end of altcoins because the whole market is red. It should be noted that the main characteristic of crypto is volatility. Therefore the price can go up or go down. It doesn't mean the end at all.
Yeah not because the coin price down means its going to dead, the price is just decrease but don't think it will be dead, before you invest your money in crypto you need to know about the volatility of the coin so you need to be aware about the pump and dump.