Bitcoin's price is flying and rising with rocket speed.. i think bitcoin will survive always as the leader while it may have competitor but i think bitcoin is the most expensive and most well-known coin in crypto currencies. So it will stay as it is..
Bitcoin will always be the original cryptocurrency, but it's highly unlikely to remain in its dominant position.
Most likely over the coming decades it will be surpassed by others. This is part of the healthy and natural evolution of the protocol.
Those reason that you two texted is correct, I am agree with that. Even ETH is attracts sime people but the amount of the transaction is still lower than bitcoin. So many countries were regulated bitcoin as currency, thats mean they thrust to bitcoin. I am sure more countries will follow them. Bitcoin is the original one and other cryptocurrency is only the alternative.
ETH even previously predicted will be a tough competitor for bitcoin is precisely at this time its popularity has begun to dim, the popularity altcoin only temporary