&gt; Why do you buy cell phones or laptops today, knowing that future ones will be better or cheaper?<p>Direct practical utility.<p>&gt; Why buy some food today, when you know your purchasing power will be greater next month?<p>I don&#x27;t eat, i starve, i die.<p>&gt; Why pay for housing when prices are falling, knowing your contract will be cheaper in five years?<p>Now there you get into something interesting. Though the five years view is comically long.