@dsh The useful thing is making other people transfer money to you. The actual utility of blockchains is pretty marginal in the real world. Even for money transfer a popular choice like Bitcoin really isn't all that great when you're used to fiat currency with a sane banking system. As I understand Bitcoin even if you manage to get your transaction in the most recent block the average time to get it included is 5 minutes. In my country online payments are near instantaneous, go through my own bank (merchant redirects to a website hosted by my bank where I authorize the transaction) and are from my perspective free.

Really Bitcoin has very little utility value (as opposed to investment value) over regular banking systems unless your banking system is terminally broken or the ability to hide transactions from the authorities outweighs any other concern.