I don't understand paper wallets.
Hi FinShaggy, what do you mean? That you don't see the usefulness of papaer wallet and cold storage?
No, I don't understand how you get a coin from a wallet to a serial number or barcode or whatever. I don't really understand how they put information in a barcode either...
I can tell you my experience: I have my wallet with blockchain. I access it online but I also have the app on my phone. From the website, I exported my wallet into a paper form (easy guided process online). Now in this piece of paper I have both the pubkey and the private one. I made a copy of the pubkey only - it comes both in the usual form (1hmsn84...) and in QR code. If anyone want to pay some BTC to me, I just give him the piece of paper or he can scan the QR code. Exactly same process if I want to pay my bill at a bar: the waiter will show me the bill QR code, I scan it and pay!
Is it helpful?