While winning $30 million is almost certain to put a smile on anyone's face, it still does not guarantee long-term happiness.
As the big prize for this week's Big Wednesday draw reaches a record $30 million in cash and $1.7 million in prizes, financial advisers say the winner is "fair game" without fiscal guidance.
Spicers Wealth Management senior financial adviser Jeff Matthews said instant, vast wealth could "blow a person's mind".
He had seen it happen among his clients, who included a couple who won $2 million on Lotto but struggled with their newfound fortune and nearly blew the lot.
The husband went on a spending binge, buying expensive cars which devalued quickly and were eventually worth a fraction of what he had paid.
He also tried property development but failed.
"This man would just spend and could not stop," Mr Matthews said.
The marriage was strained, as his wife had more conservative spending habits.
Within a few years, the couple were both back at work, saved from complete disaster by two mortgage-free properties.
"People need to build a satisfactory support mechanism - perhaps a trusted adviser, a good accountant or a good lawyer, or someone you can rely on. Without it, you're fair game."
Roger Sutherland, director of Grant Thornton Wealth Management, said winners needed to keep their emotions in check and stay quiet.
A couple of his former clients made the mistake of "telling the whole world" about their Lotto win.
"Soon, friends and family - and even total strangers - were asking for handouts because they had made a song and dance about what happened."
Within three years, the couple were back to exactly the same assets and lifestyle they had before winning.
"They got the flash cars and would decide to change and get another one, and every time they did something like that they lost money," he said.
"They really just had no idea of how to handle that quantum of money."
Mr Matthews said conservatively depositing all the winnings into the bank would be a big and safe earner.
At 5%, $30 million would yield $1.5 million before tax of $570,000 for a total of $930,000 a year.
"That's about $77,500 a month, or $17,885 a week to come and go on," said Mr Matthews.
Liz Koh, director of Moneymax financial planners, said winners were often traumatised and suggested they bank the money for at least six months while trying to work out what kind of life they wanted to live.
"It sends some people into a complete fluster and it can take them a while to work out what is really important to them."
She recommended to "have a little bit in everything".
"Cash and fixed-interest are your conservative investments while property and shares are more aggressive," Ms Koh said.
"Obscure, middling investments" people might choose included forestry, classic cars and art.
"But those are not what you would consider to be part of your core portfolio and you would definitely need some kind of expertise in those areas."
Mr Sutherland doubted a $30 million winner would invest in high-risk schemes, nor would he advise them to.
"People generally take risk because they want a greater return or they can see an opportunity," he said.
Those willing to accept the risk could buy commercial buildings.
"It has some risk but gives you the opportunity to get some capital gains if you buy well."
Mr Sutherland said small allocations to a competent hedge fund manager would also be a "pretty smart move".
He suggested people find a focus in life after their win - something about which they were passionate but knowledgeable.
"I have a friend who restores warbird aeroplanes and most of his clients are hugely wealthy people from offshore. Most of his clients are playing with 10 or 20 mill [ion] and it's play money."
