My other post forgot to mention that Bitcoin is an amazing story, which is not going away soon. You might want to buy just one (?)
"I need to do more research."
Caution is good, even though there is a chance it will rocket higher.
"...the entire concept of digital currency is consfusing to me."
The security side of Bitcoin is very technical, but virtual currency is simple. WOW Gold and Second Life (Linden Dollars) are examples of centralized digital currency.
It's all play money (even paper USD) until people accept it as payment.