Bitcoin is a P2P digital currency that is these things:
• Standard currency of the Deep Web • P2P cryptocurrency • Mined using a process similar to Folding@Home - Bitcoin mines by making calculations while Folding@Home solves protein folding problems. • A high-risk investment • A experiment on digital currencies, not readily accepted yet • Has a parody called Dogecoin • Extremely liquid • Neither a "standard" nor fiat currency • Secure • Lacks a physical representation
Basically, Bitcoin is a currency that is backed by mining and protected by encryption.
For small transactions, maybe. But the whole "High Risk" part is scary, which is why I don't use it. I don't need anything from Silk Road either, so it is of no use to me.
When I was younger and dumber, I might have used it to purchase illegal hallucinogenic and otherwise mind altering substances. If I did, I might have ended up dead or in jail. So I'm glad it didn't exist when I was younger and dumber and I wish it didn't exist now for the sake of those like how I once was.