Well it depends on at which point you entered.
I entered to the Bitcoin world when BTC was 100 USD so I had my original investment * 10 right now.
Also got some Litecoins and made reasonable profit from that.
I am super cool but I wont consider I lost money if BTC goes down to 700 USD tomorrow (because actually I did not).
If the bubble plops and BTC goes down I might sell a little bit if I consider I will be able to
buy cheaper later.
Even if it goes down to 400 USD I am a winner here since two months ago I got some BTC for saving
and that I did ...
That's kind of the way I look at it too. I intend to sell a percentage (I haven't decided how much) if it gets down to a certain level. After that if it gets lower I'll sell another portion.
Eventually I would like to sell enough so that my original investment is paid for. After that I'll sit on my bitcoins made from profit until the next run-up.