The way Bitcoin prize is dropping at times, one would think is going to drop to $0 and never to get back again. Since I saw how it went from $30k (if I'm not mistaken) to $15k and later came up back rapidly it got me surprised because to me I never thought it would be that fast and I'm expecting another boost again to maybe $50k (that's when I feel investors would go crazy) and above. But going to $0 it can't instead of $0 it will elevate.
While there is no guarantee for bitcoin to be at a very high price every year, the probability of it hitting $0 is extremely low. The bitcoin economy continues to grow and develop and its adoption is increasing so much that it will make the opportunity of bitcoin going to $0 unimaginable. In fact I believe that in 20 years the price of bitcoin may exceed what we imagine today, but nobody knows what will happen. So instead of speculating on what the OP is worried about, it's really good to start accumulating your bitcoins while the price is still low.