Preparing for the future is really the best reason for holding bitcoins. I am saving all my satoshi right now with the hope that when the price of bitcoin hits 4k dollars each I will convert it to cash and I will build my own house. For now I already have saved 0.1 bitcoins and I need more 3.9 bitcoins to make my dreams come true. Well its a tiring job to earn bitcoins and to hold it but its worth a while when my house will be erected in the future