Any very serious worldwide instability will crash crypto prices to zero or near zero. This goes for a geopolitical crisis like a large scale war or an economic crisis like a severe global depression. Crypto is valuable right now because there is global stability and people have the confidence to speculate on crypto in an effort to try and increase their wealth. This is only possible because of economic confidence. In both the conditions I listed above, economic confidence disappears and people flee risky assets for safer ones. Crypto is among the most risky assets, and it will crash with severe economic uncertainty because it's useless in times of crisis.