Most altcoins have basically gone to zero. The coins I traded most actively back then were NAS Nebulas, BTO Platinum Chain, DBC DeepBrain Chain, EOS Ethereum, ZEC Zcash, DASH Dash, DOGE Dogecoin (this one survived because of Musk), Litecoin (the founder liquidated his holdings), HC Martian Project (exchanged tokens with Sun Yuchen, who then liquidated his holdings), GXC GXS (the founder was arrested), and some exchanges like BISS and ZB have also disappeared; they were very popular back then. Now, looking back, besides Bitcoin, Ethereum, and Dogecoin, which have survived, all the others have vanished from the historical stage.