Re: Historic mistake: Microsoft rejects to add bitcoin to their balance sheet.
Microsoft shareholders just put their money where their mouth is. Let's see how long it will take until they revise this decision after Apple, Amazon and Meta adds bitcoin to their balance sheet. They definitely never copy the decisions made by other Big Tech! 
They are likely not putting any Money into Bitcoin because it does not benefit them, their image or their Corporation in any way.
We're in the middle of a digital transformation, and Microsoft stands to benefit significantly by riding this wave, given their deep involvement in various technological innovations. They just don't get it. They view it as a speculative financial instrument. (The majority of shareholders, not the board per se.)