I can agree with the stance @hobo.media takes about some 'intrinsic value' to be derived from the survival utility of a substance or condition.

I might go a step further to say that other things can have a sort of 'extrinsic value' insomuch that they can be exchanged for things of intrinsic value. While I cannot eat a Bitcoin, I could exchange it for a lot of pizzas and so realize it's value in this sense.

I could also put it another way. Value is a measure of how much one wants something. Things of intrinsic value necessarily generate a basic level of want. Biology demands water for it's processes and so we want to drink. This want-value I think is a bit more general and can be applied to things like speculative assets and luxury items as well as utility items like computers or necessities like nutrition.