There's a very high probability that a stock market crash or correction will positively influence cryptocurrency markets, if the right instruments for large & institutional investors are in place (ETF, anyone?).

Why large investors?
Small & retail investors are the most likely to lose their money during such a crash and they will always take a break before becoming curious again about investing into anything. They will need to recover their losses.
Large & institutional investors will already be out of the markets by then or will time their market exits accordingly. For those, the small size of cryptocurrency markets is extremely attractive to realize extraordinary gains.