If what you mean by Bitcoin crash is crashing to zero, that is not possible, because there will always be people who want to buy Bitcoin. But if you
mean Bitcoin crashes are falling prices, then they will happen a lot. What we remember most is the Bitcoin crash that occurred in 2018, although
Bitcoin's decline was quite deep.
But Bitcoin has finally recovered, even this year Bitcoin managed to surprise us all by hitting a new ATH price. Therefore, there is no need to worry
about knowing Bitcoin crashes, because it will happen often. What we need to do if Bitcoin crashes is still HODL the Bitcoin that we have, because
the Bitcoin price will definitely recover soon.
Bitcoin will not crash but it may take correction. Bitcoin will never become zero. Although it may seems that bitcoin is at 40K and looks quite expensive as compare to few months before when bitcoin price was only 12K. However, in few years time you will look back and find the current value at 40K to be very cheap.