Yeah the value has dropped by 20% in 24 hours but don't despair. The value (in my, and many others, opinion) is driven by the effort that goes into creating new bitcoins.
I don't know if you know or not so excuse me if it's what you already know in my best efforts to comfort you.
Bitcoins are created by mining. This is where people with the right computer software and power verify bitcoin transactions by solving complex mathematical problems. This keeps bitcoin safe and they are rewarded by their success with bitcoins!
So these computer boffins effectively mint the bitcoins. However, the amount of bitcoins available to mine halves exponentially so less become available over time. So bitcoins become 'rarer' which helps drives up price.
Additionally, bitcoins also become significantly more difficult to mine. They require
so much computer energy that its extremely expensive in electricity. This means bitcoins become expensive. Just like gold, if it's rare, a finite number (like bitcoins, which will cap out at 21 million), and difficult to get drives up price.
So don't despair, it'll recover, I'm sure
