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Value can't drop to 0, but it can drop to smallest possible price, which is 1 atomic unit in currency that is worth 1 atomic unit in another currency that is worth 1 atomic unit of yet another currency... Basically it will be worth an amount that has one less than infinite number of zeroes followed by 1. So it can be worth 0.0...01 where the three dots represent really long sequence of zeroes.

Have some pity 😁