I think it reasonable to invest in the top 10-15 alts.
However, I have some doubts about the ETH. What if BNB completely replaces it?
And all the projects and iCO in the future will be on the BNB, and the ETH will gradually die?
It wont! Ethereum has a huge marketcaps and a large number of investors, even though Ethereum will lose popularity from the BNB though it will not make Ethereum die, ETH will survive and remain alive, so dont be afraid dude.