I really want to know which alt you mean because I believe most altcoins will follow the bitcoin price trend so far. IMO, the current average of the top altcoins have fallen by more than 80% since their last ATH, I can expand the list here for comparison.
The following is the current market condition regarding the percentage decline in bitcoin prices and top altcoins after last year's bitcoin ATH.
Bitcoin - [-71.3%]
Ethereum - [-78%]
BNB - [-69.5%]
Cardano - [-84.9%]
XRP - [-90.6%]
SOLANA - [-87.1%]
Polkadot - [-86.6%]
TRON - [-73.7%]
LEO - [-36.5%]
Shiba Inu - [-90.6%]
Probably his altcoins doesn't have much volume or it is just relatively new which might have hype factor to withstand the bear market. I have some token too that I’m still in profit despite the bear season which is $APE and $GMT that I bought at very low price when these 2 tokens got listed on exchange. The majority of altcoins that is already established during the bull run are lbviously down right now sonce holders will probably securing profit in time like this.