I'll take a guess, Hyperliquid?
I don't think it's Hyperliquid (HYPE), @mk4 is an old member on the forum & I'm sure he's a fundamentalist too. So that 1 specific alt should be from the mainstream coins. It could be Ethereum (ETH), Solana (SOL), BNB (BNB), Sui (SUI), Tron (TRX) or Toncoin (TON).
BTW, are you also trading meme tokens @passwordnow? If so, what was the last one you bought & how did it go?