Limited supply the best option for me. but i am not an economic specialist and i have one meaning, maybe we need unlimited suply of currency for regulation some aspects of economy
No i do not think that we need unlimited supply for bitcoin because then it will have the same position as as dogecoin which have unlimited supply. If the supply of bitcoin will be unlimited then the price of it will not increase but it will decrease with more coins mined. For that the limited supply is beneficial and at current you are earning with bitcoin because of its limited supply.