Not all AltCoins has gone on demise and not all AltCoins is subjected their markets values in hyping. Talking about hyping coins then you should be insight that on the MemeCoins which goes on extinction after period of trends.
You can always exempt the ETH from the listed Coins because they do not share the value reliabilities.
I can also attest to it that the rest of the coin which you think may be demised by now are far better gaining their values having the crypto market exciting by investors who holds on with the Coins.
So they still remains active and gaining more weights in the market cap.