We definitely need altcoins as bitcoin seems like a project with a lot of back up but in reality is a project that needs a lot of adjustments, so altcoins could fill that gap bringing more innovation.
The less inventory of Bitcoin can also be the reason why we need Altcoin plus the very high Bitcoin price with Altcoin, we can invest even though the capital we have is not too large.
and that makes traders and investors more and more so I really need Altcoin.