If everyone moves their assets from altcoins to bitcoin, then what happens to altcoins? Let say everyone sell their altcoins, altcoins price will fall down until 0. And even bitcoin going green, no one gonna buys altcoins because it's already worthless. So your opinion is very wrong. Let's the market find their way to move up. It's better to go up naturally than get a pump.
That's right, a bad scheme if bitcoin rises and the altcoin falls in price.
Bitcoin only needs fundamental issues to raise a positive trend and naturally many investors who invest their dollars become Bitcoin and the market conditions will return to excitement. I think the price of Bitcoin has remained steady around $ 6400 because everyone is waiting for ETF decisions and other positive news.