there are so many things wrong with things you said.
first bitcoin never was in a bubble for it to pop. if it were then this recent attack would have caused the price to drop to $3000 (>50%) not down to $5500 and currently at $6700 (~10%).
second, we all know that when bitcoin drops, altcoins drop with it some even harder. of course there are always exceptions like the altcoins which are in their bottom or got dumped recently or those that are getting pumped. but the general movement is what i said.
...all the money is coming out of BTC and therefore people w...
this is the heart of your problem.
the money is never leaving bitcoin. specially when bitcoin is dropping or rising.
when it is rising, everyone pulls their altcoin buy orders, sells their altcoins,... to get bitcoin and to sell BTC when the top is reached. to buy back the correction and make a lot of profit.
when it is dropping everyone pulls their altcoin buy orders, sells their altcoins to have money so that they can buy bitcoin at the bottom and make a lot of profit.
in both cases everyone wants the profit that bitcoin offers so altcoins are left and they crash.
the only time when altcoins are shining is when they are getting pumped or bitcoin is stable so nobody can make a proper profit from it so they go to altcoins.