Which of the following statements is true about Bitcoins?

The statement that Bitcoin is the world's first digital currency based on blockchain and was launched in 2009 is accurate. Bitcoin was introduced by an individual or group using the pseudonym Satoshi Nakamoto, and it pioneered the use of a decentralized digital currency system that operates on blockchain technology. This innovation marked a significant shift in the way transactions can be conducted without the need for central authorities, which is a core principle of cryptocurrencies.

While it is true that Bitcoin does not require actual physical currency, this is primarily due to its underlying technology, which allows for peer-to-peer transactions and the verification of those transactions through a decentralized network of nodes. This eliminates the necessity for a central bank or physical notes.

The assertion regarding transaction records in banking being centrally controlled is also valid, as traditional banking systems maintain and manage transaction records within a central database. In contrast, Bitcoin operates on a decentralized network where transaction records are publicly available and maintained by miners, thus ensuring transparency and reducing single points of failure.

As all these statements accurately reflect fundamental characteristics of Bitcoin and its comparison to traditional banking, the choice that encompasses all of these truths is indeed valid.