Made a dreadful, costly error last night.

Logged into my bitcoin betting account at bitbook.biz and typed in a 0.07 bet on Arsenal to beat Chelsea at what I thought was a plump 2.5.
What I didn't know until after I checked my account a couple of hours later was that I'd left an '0' out and typed in 0.7 instead.
This meant that instead of the bet being for around 30 quid it was for around 210 quid.
I feel ill.