Yes Have you ever seen altcoin rising without Bitcoin and Ethereum ? I dont. Altcoin price depend on Bitcoin and Ethereum. Hold your coins, you will not lose.
Altcoins depend on Bitcoin but I do not see that tokens depend on Ethereum. ETH, like the other cryptocurrencies, is always following BTC. That is why it is very important to have Bitcoin in your portfolio.
yes, all Altcoins including Ethereum also depend on Bitcoin, Bitcoin is king so all of them refer to BTC now, the quality of Bitcoin is very good so it is suitable for investment in the long run.