I don't think so : an altcoin, whatever his technology may be will never defeat Bitcoin, because to elect the best crypto-currency, we look at how many people use it. No altcoin will ever surpass Bitcoin because the average people absolutely don't care about the internal problems, and I do not see any internal problem as of today. The branding is whatever matters the most, and good luck defeating Bitcoin's branding ! Most of the people that know some economical things knew about Bitcoin, but absolutely none about things like Ethereum or Litecoin. Good luck releasing something that beats Bitcoin on all the points, which is basically impossible if you conduct an IPO or an ICO.