So what do you think would happen if another Cryptocurrency (Example Monero / Ethereum etc) were to take Bitcoins spot as first in market cap?
Well if that will happen thier will be a new king on crypto but as we see so far that theres no other coin can surpass the value of bitcoin.
No chance! for now and in the next few years bitcoin will continue to dominate the market, bitcoin dominates more than 50% of the marketcap in the market, and will continue to dominate at any time, developers will continue to make bitcoin in line with the times, so I don't think there is a crypto that will replace bitcoin..