I have to think that a lot of people losing money in the stock market may be unable or unwilling to get into BTC now and in the near future. They've lost their shirts and will have to adjust before embracing a risky thing like BTC. Ultimately BTC will prevail, but there could be a slowing of new money into the economy for a bit while people recover their ground. They will see the value of BTC all the more through their fiat-based losses, but they may not be able to spend any money at all for a while.
Or maybe they will finally realize that risk and volatility are two totally different things on a human discounting horizon, and decide that its better to be rich and autonomous than to be a poor slave.
It could happen. Not likely, I admit, but possible.