Shitcoin is a call for altcoins at very low prices like 10sat or can be lower than that.
I think altcoin is keep needed and not only coins with just born and gone in time.
We can see lots of exchanges and even grow over time, the problem is who will place it the exchange if it's not an altcoin.
It is true that altcoin is now experiencing a continuous decline because BTC continues to increase, but I believe that later Altcoin will also increase to adjust to current BTC prices.
maybe it takes time but indeed it will definitely happen for altcoins that can survive.
That just pure my Opinion and my Analisys self.
There are many coins which are worth Satoshi , take the same for example btt , you want say that this coin not enjoys large demand ? this coin is always big trades , for me shitcoin are those that are above 200 places in capitalization