I agree with the first part of what Tytanowy Janusz said, during crises people are known to stay away from higher risk assets and bitcoin being volatile doesn't help that either so it surely is not the "ultimate hedge" against the financial crisis.
but bitcoin being what it is, has always been acting separate from any other market. for example when other markets are falling bitcoin has been rising in the past or vice versa. it always moves on its own and on top of that being a global asset it doesn't take effects from local incidents that much.
so in my opinion in case of a financial crisis bitcoin would either not be affected at all or rise at least a little.
Asides from bitcoin even being separate from other market, it is still very much new, and what really gave birth to it in the first place was a result of the financial crisis that ended in 2008. How bitcoin would respond to the next crisis is something we will just have to wait to see with time, but I believe one way or the other, among other things, it will serve the main purpose for why it was created in the first place which due to its deflationary features, can serve as an hedge during such period, but time will tell.