Wozniak had 7 Bitcoins stolen

Apple co-founder Steve Wozniak is a fan of Bitcoin. He bought some as an experiment at $700 to learn about how they worked.

He eventually decided to sell them because he didn't like watching the price moves each day, something he revealed at the end of January. That's when the trouble started.

"I had seven bitcoins stolen from me through fraud. Somebody bought them from me online through a credit card and they cancelled the credit card payment. It was that easy. And it was from a stolen credit card number so you can never get it back," Wozniak told the Economic Times of India today.

He didn't identify the platform he tried to sell it with or other details.

Bitcoin is up $287 to $10,207 and would be worth $71,449 today.

That's pocket change for Wozniak (who is worth $100 million) but it's a lesson for others. He said he's sold all his Bitcoins except one.

"The blockchain identifies who has Bitcoins... that doesn't mean there can't be fraud though," he said.

Many credit card issuers have banned cryptocurrency transactions.

If you want to learn about crytpocurrencies, here's an opportunity.