me personally good altcoin to hold during this season is Ethereum, because they are famous concept everyday people launch lately called " DeFi " or decetralized finance because most of them are creating their utility token on ethereum chain, you see that ethereum price having good time pump during this month from 200 to 300 because of hype DeFi project now, also i think ChainLink is good for hold to.
for me not only this season mate, because ethereum will always be my favourite altcoin
i believe the hype on defi project will bring more demands on eth, and for sure the price of ethereum will growing more