in the 1970 case of dizon-rivera v. dizon ( 33 scra 554-557 [ 1970 ] ) , we ruled against appellants and held that the decrease in the purchasing value of the philippine peso provides no legal basis or justification for completing their legitime with real properties of the estate instead of being paid in cash , reasoning thus : t.hqw neither may the appellants legally insist on their legitime being completed with real properties of the estate instead of being paid in cash , per the approved project of partition .