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.
Well, I think it is possible since crypto sphere is unpredictable and some altcoins are evolving or being developed as time goes by. However, if we will look at the market capitalization, bitcoin market cap is way too far from XRP.