I am going to say Ethereum would be the top altcoin in the top 100 to hold. $ETH hasn't gotten started yet on the type of price increases this will do. It's the leading altcoin if you had to say one. But there are other coins like $PUMP , $SOL , and $UNI that are some to watch out for in the top 100. But there are others too, like $XRP and BNB, that I would add to the mix. Ethereum is like the safe pick if you had to choose just one. But I do like XRP, and SOL being right up there, in my opinion.