Debit Cards are going to scale Bitcoin and take Bticoin mainstream.

While the system works well enough for most transactions ... Satoshi Nakamoto, Bitcoin white paper. In this example we're going to effectively scale Bitcoin to 17 MB blocks using mainstream credit/debit cards. LET'S BUY 50 COFFEES ($2 EACH) Using a (Xapo) Debit CardYou got, bought or mined bitcoin: 1 on-chain transaction (for example to your Trezor)You send $100 worth of bitcoin to Xapo: 1 on-chain transaction.Xapo sends your $100 worth of bitcoin to their main address: 1 on-chain transaction.Xapo probably sells a large amount of bitcoin a few times a day but let's neglect that.So 3 on-chain transactions.Xapo is about 3% cmore expensive than Kraken, so a 6 cents fee per coffee: comparable to 1 on-chain bitcoin transaction.So we can buy 50 coffees with 3 on-chain transactions and the same fee as on-chain transactions. Using a Bitcoin WalletTo buy 50 coffees you have to pay about a 6 cent fee per coffee and need to make 51 on-chain transactions! Using a Lightning NetworkCould someone explain how that would work if you buy your coffees at many different previously unknown places? The only difference between a debit card and a bitcoin wallet is that you have to trust the company with $100 of your money (50 coffees). A very acceptable risk if it's a well funded company making a healthy profit from transaction fees. For that small sacrifice we effectively scaled Bitcoin to 17 MB blocks (=51/3 MB). via /r/Bitcoin http://bit.ly/1X3O27E