What is the significance of txid 00000000000000000021e800c1…

What is the significance of txid 00000000000000000021e800c1e8df51b22c1588e5a624bea17e9faa34b2dc4a?

https://www.quora.com/unanswered/What-is-the-significance-of-txid-00000000000000000021e800c1e8df51b22c1588e5a624bea17e9faa34b2dc4a-on-Bitcoins-blockchain