So what do you think would happen if another Cryptocurrency (Example Monero / Ethereum etc) were to take Bitcoins spot as first in market cap?
Nothing will happen except that the name of the top coin will be different but it is unlikely any of the current coins can take that spot out of bitcoin because they do not really bring anything that is revolutionary to the market to take that position away, we will need a completely different concept for that to happen and I am not sure if I am going to see it.