Bitcoin Isn't Completely Anonymous
Because all Bitcoin transactions are stored on a public ledger known as the blockchain, people might be able to link your identity to a transaction over time. Some companies offer various tools such as Bitcoin mixers to help achieve greater privacy, but it takes a huge amount of effort to use Bitcoin anonymously. You may want to follow your country’s tax regulations regarding Bitcoin in order to avoid trouble with the law, but you have the power not to should you choose to take that risk. To improve privacy, most newer Bitcoin wallets will use a new Bitcoin address each time someone sends bitcoins to you.
Unconfirmed Transactions
Bitcoin transactions are seen by the entire network within a few seconds and are usually recorded into Bitcoin's world wide ledger called the blockchain, in the next block. While it’s possible that a transaction won’t be confirmed in the next block, in the vast majority of circumstances it is fine to accept a transaction as soon as it has been seen by the network. Unlike traditional payment systems, Bitcoin transactions are lightning fast and can be sent globally. Bitcoin is still relatively new, but with each passing day the technology becomes more reliable. It is more and more unlikely that a major bug will emerge in the system as time goes by, and people can trust the technology more with the passing of time. Each month people transact hundreds of millions of dollars worth of Bitcoin.