There is no doubt Bitcoin still remain stronger, A lot of shill happening that Bitcoin will be replaced by altcoin like as an example the Ethereum flippening case. Statistics shows Bitcoin is yet still remaining powerful. It is shown that the community still yet aware that Bitcoin is the leaders of cryptocurrency.
I don't think for those who felt bitcoin can be replaced by ETH or other altcoin whereas the market cap between bitcoin and altcoin is very far away, bitcoin have 116 B and ETH just have 24 B. I feel it won't be happen, altcoin holders were very ambitious with this problem, might because of the impact of pump and dump that always occur in the altcoin market.