First of all the chances that this would happen is almost 0, still just imagine that you woke-up in the morning and you see that the Bitcoin worth became Zero, simply get back to sleep again, take a short nap and refresh the page again in few minutes and you will see that the values just changed from 0 to something higher. That's the exact way this works.

Always remember Bitcoin is unpredictable, it can go up and it can go down anytime but the chances that it will go down to 0 and stays to 0 forever is almost 0%

In-fact, if that happens then what happens to the future of this forum and users who love to stay on this forum on the long run?

There are many users in this forum & outside the forum who have invested a lot in Bitcoins.

So don't worry, such a scenario won't ever happen at-least during our generation for sure.