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.
Possibly, if holding it gave the investor a reliable and genuine source of passive income.
Bitcoin is great but it doesn't provide any benefits to hodlers other than the fact it is deflationary
If for example, holding a coin gave the investor airdrops of REAL value and/or you could rent our your tokens for a decent price, then maybe such a coin could overtake btcs market cap