A look at
coinmarketcap.com
may help to make your own opinion.
he said the best not the one with the biggest cap, which is etheruem and ripple, but ripple is trash it's not an altcoin in the very emaning of it and etheruem is centralized and will be pos only, therefore the second best should be zcash or monero, but i prefer the former for better anonymity
I'm also agree that etherium (ETH) is a great value of altcoin recently as we know that altcoin also being used by Mircrosoft , it means that they believe on ETH
Anyway just made 0.05 profit from it , a week ago