90% of altcoins will probably die and only the good one will survive.
Bitcoin will lead the way for the crypto market.
There will be altcoins that can survive either, having a huge market cap, community, listed on many exchanges -decentralized and not. Don't be too focused by diversifying much because you may get a lower volume from the best coins like bitcoin.
Instead of putting a good capital to bitcoin it will only go to an altcoin that you're not really believing.