Those of us who are digitally challenged are cheering bullion in its battle against Bitcoins for this year's best bubble.

A Bitcoin is a crypto currency used on the internet instead of credit cards or direct deposits and was worth $40 at the start of last year, before hitting $1200, from where it has since halved.

Crypto currency ... Bitcoin has been known to move 400 per cent in a week. Credit:iStock

It has been known to move 400 per cent in a week, so by the time you read this, it might have the upper hand, but, until last year, gold had been going gangbusters for a decade and seems to be bouncing back.

By rights a Bitcoin should be worthless. It isn't money backed by the might of a central bank but just a string of computer code. To own one, you need a digital purse, which can only be opened with a password.