You can also look at it as: When the rest of the market wants to cash out, it has to go through Bitcoin. So Bitcoin, in effect, is only as valuable as the rest of the market.

Meaning, Bitcoin is not the driver of the value of the crypto market, but merely the vehicle through which value transfers. As such, when the overall market corrects, the increase or decrease in the value of Bitcoin isn't the stimulus, but instead the change in value of Bitcoin is merely the response to the stimulus (i.e. market correction).