Investing in bitcoin is a risk, as the value can crash tomorrow.
I'm holding too so far, I believe in what bitcoin represents, so I'm taking the risk. Don't invest more than what you can afford to lose however, but if you can, you should buy more.
Also have a look in other cryptocurrencies.
Good advice Chris314, but it is a little un-nerving watching the value drop steadily, I would like to buy more BC but unsure as to where it will end up. I guess line all others hoping to see a recovery soon