Bitcoin Investor who left school at 15 to work at McDonald's is now worth $15MILLION (Details, pics)

One of Australia's leading Bitcoin millionaires claims there is only weeks left to invest in cryptocurrency before the price skyrockets to as high as AUD$100,000.

Sam Karagiozis left school at the age of 15 to work full-time at McDonald's. But after starting property, food and now a bitcoin business, he is worth a total of $15million.The entrepreneur and self-proclaimed 'hustler' has made headlines in recent months for creating his 'Auscoin' cryptocurrency and ATMs where it can be bought like cash.

Mr Karagiozis, 26, has formed a partnership with tennis star Nick Kyrgios, selling him and his brother 'quite a bit' of Bitcoin and sitting in his box at the Australian Open. Speaking with Daily Mail The Melbourne-based millionaire revealed close to all of his fortune is invested in cryptocurrency and said his only advice for those who are considering buying the internet currency is this: Do it now.

After peaking at close to AUD$25,000 late last year the price of Bitcoin has dropped to as low as AUD$13,000 in recent weeks, but Mr Karagiozis claims he isn't worried.

'The first quarter of this year is probably the last opportunity people are ever going to get to buy Bitcoin for under AUD$20,000 a coin,' he told Daily Mail.'

This is the time people want to get in. It might go a little bit lower but it just comes down to the news and people panicking. 'People who invested two weeks ago might be a little stressed, but they shouldn't be because it's nothing new for Bitcoin to crash a bit.

'I'm predicting that Bitcoin is going to reach AUD$100,000 by the end of 2018 and in three to five years it will hit AUD$500,000... there's not a doubt in my mind.'

So entrenched is Mr Karagiozis in the 'crypto' game that late last year he launched a series of ATMs that allow Bitcoin owners to turn their internet currency into cash.'

I really got into bitcoin by mistake, stumbling across it when it was at about $2 and I thought it looked like a cool investment, so I put a bit of cash into it,' he said. 'Pretty quick it got it up to $4 and I thought I'd conquered the world, so I sold it all.

WHAT IS CRYPTOCURRENCY?

Bitcoin is a digital currency, known as cryptocurrency, which began in 2009 and were initially worth just a few cents. Thousands of amateur traders are now betting huge amounts, while start-up companies use bitcoin to raise money and avoid the transparency needed in a stock market float.

In 2013 they hit the USD$100 mark for the first time, before rising to USD$900 at the start of 2017. Today they are worth USD$12,000 (AUD$17,000).But experts fear the currency has become a vast speculative bubble detached from reality.

Watchdogs across the world have warned there could be a sudden massive crash if the market turns, losing investors billions of dollars.

Economist Nouriel Roubini, who predicted the global financial crisis (GFC), is one who has called cryptocurrency a 'giant speculative bubble' bound to end in disaster.