Yes, this is possible. Although it seems hopeless now, there may be coins that can surpass Bitcoin in ten years. It may be a government coin.
Even though any cryptocurrency will surpass Bitcoin in the future, It won't be a government oriented coin. Because people are after decentralization. That's why they got involved in bitcoin in the first place. However, nothing last forever. Same goes for the bitcoin top spot. For now, I don't see any cryptocurrency that has what it takes to overthrown bitcoin.