While the billionaire co-founder of Atlassian, Scott Farquhar, was making headlines with the purchase of of Australia's most expensive house - the $70 million Point Piper estate Elaine - his business partner, Mike Cannon-Brookes, found something to crow about in another tech punt that has apparently proved a winner.

One ounce of Bitcoin, the crypto currency, is now worth more than an ounce of gold, Cannon-Brookes tweeted on Monday.

In a follow-up tweet, Cannon-Brookes confirmed he had taken a "bet" on bitcoin - rather than an investment - which has paid off handsomely.