It's almost 8 months of 2018 and we have not seen any reasonable hikes for the altcoins,
It was only Ethereum that hit a good value of almost 1.4k$ in the beginning of the year . Since then it's pretty dull.
Forget overtaking can any ALTCOIN ever reach a value near Bitcoin.
I think it is possible to see an altcoin which can be stronger than the bitcoin in the future. Although bitcoin is the king of the cryptocurrency world, ultimately it is a coin and I don't believe that it is unbeatable.