So what do you think would happen if another Cryptocurrency (Example Monero / Ethereum etc) were to take Bitcoins spot as first in market cap?
I don't think it has any effect, because from what I see now that the average all cryptocurrencies in circulation are independent cryptocurrencies. For example, the price of Ethereum/Bitcoin is very far compared to the price of Ethereum/Bitcoin in 2017, that means the price of Ethereum is not influenced by Bitcoin, as well as some coins in the top 100, most of which are independent coins, CMIIW