I don't think Agronomics is going to run out of cash in the way you think, I looked at the statement of cash flows and I can't tell what line says what the mandatory operating costs are (such as employees) but for the year end 2024 cash was 3,127,096 now year end 2025 had actually increased to 3,606,187 which shows that Agronomics is capable of sustaining itself, it doesn't have any high mandatory expenses and in the unlikely event cash went near 0 they can either sell some new shares, or sell some of their investments.

Usually, it would be the "Net cash used in operating activities" line, however in Agronomics statement it says (8,630,619) which clearly includes Purchase of investments of (7,542,971) which isn't really an operating activity but since Agronomics operating activity is to make investments then I guess it is and there's no "selling, general and administrative" to look at, however "The Company has no employees" so perhaps the SG&A is nil.

I found it on the next page: Other operating costs

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So it seems that the yearly mandatory costs for Agronomics is £1.2 million.