for now I prefer to ETHEREUM, LITECOIN, BINANCE and SOLANA. but you can choose which one you will like. I think $16K you can choose from the ones I recommend if that suits you.
this is best assets selection at this moment with each of their own fundamental . Solana will be great project that explode more in near future while its ecosystem could growth massively.
When we choose altcoins of course the most important thing is to know the details of the team, if we aim for the long term then choosing a top ranking like Cardano, Solana, and wrapped bitcoin is the right solution.
yes, we must understand the fundamental behind this project especially the utility and usecase that will builded. how dev team will solve any problem in market will be additional value in investors sight.