If a crash on stock market happens today while bitcoin is still on this phase then the price of the coin will be affected. We should remember that the coin don't have it's own value yet and it is just depending on the real money's value. Imagine if a number of people who owns a coin is affected by the crash and needs to sell their coin just to recover their loss. It will cause an increase of supply on the market and definitely reduce the number of demand which will cause to a deep on prices.