On May 22, 2010, a developer bought two pizzas using 10,000 units of a then-little-known digital currency called bitcoin.
Today, 10,000 bitcoins are worth more than $20 million (£15.4 million).
Bitcoin is going nuclear. Its price is tearing upward, with each bitcoin worth $2,128 (£1,638) — a little shy of its all-time-high of $2,185 (£1,682) reached earlier Monday morning.
Just a year ago, it was trading at just $443 (£341), after deflating from what was then seen as the giddy highs of about $1,100 (£847) in late 2013. It has since embarked on an epic bull run.