What are the biggest mistakes you've done with Bitcoin?

[MelodyRowell]

Did not buy any Bitcoin before this hike....

[proudhon]

Had ~150 BTC sitting in bitcoinica.

[mises]

I'd say not buying more of it when it was in it's infancy.

[beetcoin]

i knew about bitcoins since late 2011, and only until early this year did i get involved. big, wasted opportunity. i guess that's the price you have to pay by being lazy. it's also probably my fault for not having the foresight to see the potential in BTC.

[wmcleod]

selling a piece of mining hardware (through craigslist) to an international buyer....

i was young and dumb.

[irpirate]

My biggest mistake has to be finding out about bitcoin way too late  .

[b!z]

Deleting Bitcoin-QT in 2010 because the blockchain took too long to download.

[mb300sd]

Deleting Bitcoin-QT in 2010 because the blockchain took too long to download.

There was no -QT in 2010 it was wxBitcoin

[goxed]

Order ASIC from BFL!

[Ecurb123]

my biggest mistake was also what helping support the btc economy, spending them.

[b!z]

Deleting Bitcoin-QT in 2010 because the blockchain took too long to download.

There was no -QT in 2010 it was wxBitcoin

Yeah, I should have wrote "bitcoin client". I did not remember the name :-)

In 2011, I gained interest in Bitcoin again, and I stored my coins in MyBitcoin. It was a big mistake.

[simplydt]

Laugh it off when I read about it in 2010, thinking leaving my pc on to make $0.02 cents an hour doesn't seem worth it (1 bitcoin an hour). If I had actually read the whitepaper and investigated a bit more rather than compare it to one of those stupid ways to make money online, I may have made some bitcoins to keep. Boo!

[eoJ]

Could've been worse.

[Piper67]

I'd say not buying more of it when it was in it's infancy.

Bitcoin still is in its infancy.

[xinzark]

In jun i had over 800 Btc and i sold them now i am left with just a few btc very regret now

[FreakNet]

Wasting my bitcoins and buying gift cards with them last month.

[Lucky - Luciano]

-Buying BF Labs 50 Ghash / s + 5 Ghash / s
-Buying ASIC MINER BLADE
-Purchase Quark coin at a cost of 0,0000036 BTC/QRK.
  However, I am still happy with Bitcoin .

[kuusj98]

Getting involved in the biggest group buy scam of all times, back in the day I ordered 1 USB Block Erupter at .89 BTC in a group buy ran by vdragon. I think he ran away with more than 1000 BTC.

Those .89 BTC where all my bitcoins I had, and also the first ever coins I earned, I really had to let a tear when I found I was scammed...

Next week those goddamn pieces of shit could be bought for .25 BTC.

[freethink2013]

Apart from not buying enough when they were cheap, nothing. Was going to say I paid woman to do stuff on cam but honestly, I've no regrets about that.

[BitcoinBarrel]

I downloaded the Bitcoin client a couple years ago, but saw no use for it at the time.