Bitcoin – The Internet of Money
This is very interesting:<p><i>Bitcoin has a scripting language which enables more than a “send money from X to Y” transaction. A Bitcoin transaction can require M of N parties to approve a transaction. Imagine Wills that automatically unlock when most of the heirs agree that their parent has passed, no lawyer required. Or business accounts that require two of any three trusted signatures to approve an expenditure. Or wire escrows that go through when any arbiter agrees that the supplier sent the goods to the buyer. Or wallets that are socially secured by your friends and family. Or an allowance account accessible by the child and either of two parents. Or a crowdfunding of a Kickstarter project that pays out on milestones, based on the majority of the backers approving the next payment. The escrow in each case can be locked so that the arbiters can’t take the money themselves – only approve or deny the transaction.<p>The scripting language can also unlock transactions based on other parameters. Unlocking them over time can enable automatic mortgage, trust, and allowance payouts. Unlocking them on guessable numbers creates a lottery auditable by third parties. One can even design smart property – for example, a car’s electronic key so that when and only when a payment is made by the car buyer to the seller, the seller’s car key stops working and the buyer’s car key (or mobile phone) starts the car. Imagine your self-driving car negotiating traffic, paying fractional bitcoin to neighboring cars in exchange for priority.</i><p>I've been following Bitcoin since the beginning and had no idea it supported "transaction approved only when M of N participants agree."<p>How do you feel about those scenarios?  Also, does anyone know of other little-known Bitcoin functionality?