BTC will stay, it is destiny is to survive and complete the journey along with other trusted powerful altcoins.
Block chin technology id dominant and the fuel for it is the Cryptocoins mastered by BTC.
The problem is about the whales who trade and trade and control the price to gain fast money, they don;t concentrate on investing for long time to raise the price like Dec. 2017, but they trade fast and gain fast many times to have liquidity for more and more trading.
Investors are the solution not traders.
And this is the problem.