Why is the young Gatby drawn to Daisy?

Nick, in his reflections on Gatsby's life, suggests that Gatsby's great mistake was loving Daisy. He chose an inferior object upon which to focus his almost mystical capacity for dreaming. Just as the American Dream itself has degenerated into the crass pursuit of material wealth, Gatsby, too, strived only for wealth once he had fallen in love with Daisy, whose trivial, limited imagination could conceive of nothing greater. It is significant that Gatsby is not murdered for his criminal connections, but rather for his unswerving devotion to Daisy. As Nick writes, Gatsby thus "[pays] a high price for living too long with a single dream."