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.
nothing can Overthrow BTC

not even a NUKE
We should back to the last year when the total marketcap of altcoin has surpassed bitcoin. at that time and bitcoin has only got 33% domination on the CMC which means it looks possible to altcoin to overtake bitcoin but remember this terms in the total marketcap.