After confirmation, a transaction can‘t be reversed. By nobody. And nobody means nobody. Not you, not your bank, not the president of the us , not Satoshi, not your miner. Nobody. If you send money, you send it. Period. No one can assist you , if you sent your funds to a scammer or if a hacker stole them from your computer. There is no safety net.
Neither transactions or accounts are connected to real-world identities. You receive Bitcoins on so-called addresses, which are randomly seeming chains of around 30 characters. While it’s always possible to research the transaction flow, it isn’t necessarily possible to connect the important world identity of users with those addresses.
3. Fast and global
Transaction is propagated nearly instantly within the network and are confirmed during a few of minutes. Since they happen during a worldwide network of computers they’re completely indifferent of your physical location. It doesn‘t matter if I send Bitcoin to my neighbor or to someone on the opposite side of the planet .
Bitcoin funds are locked during a public key cryptography system. Only the owner of the private key can send cryptocurrency. Strong cryptography and thus the magic of massive numbers makes it impossible to interrupt this scheme. A Bitcoin address is safer than Fort Knox.
You don‘t need to ask anybody to use cryptocurrency. It‘s just a software that everyone can download for free of charge . After you installed it, you’ll receive and send Bitcoins or other cryptocurrencies. No one can prevent you. There is no gatekeeper.