Ask HN: What is scarce now - what will our descendants be addicted to?

We're addicted to sugar because this power store was vanishingly rare for most of human history. We horde objects and clutter our lives because "things" were hard to come by in the past. You obsessively hit reload because your ancestors were starved for knowledge and for glimpses of a wider world beyond their immediate surroundings. So, what is scarce now - what will our descendants be addicted to?