Collection Question- multiples

[Vintageloz]

Quick opinion from the group. if you are collecting or working on more than one project that requires the same card do you collect multiples of that card or count the same card twice? For example if you are working on a 1954 topps set and a HOF rookie collection, do you get two of the Hank Aaron card or count the same one as part of both projects? Trying to prioritize my collecting needs and struggle buying a duplicate of one card at the expense of another that I have none of, especially high dollar cards. Would love to hear the groups opinion on how others handle. My inclination is have multiples so that each set or collection can stand on its own merit but what determines where the higher grade one goes?