The number of Higgs "particles" per unit volume is not a meaningful quantity, as the Higgs field does not typically exist in a state with a defined particle number outside specific conditions like those in the LHC. The distinction between on-shell and off-shell Higgs bosons is crucial for understanding interactions. While the concept of particle number is problematic, questioning whether the Higgs field value remains constant in expanding space is valid. However, the Higgs field itself is an operator rather than a simple number, complicating discussions about its value. The average energy density of the Higgs field may remain constant as the universe expands, similar to dark energy density.