. Bitcoin is anonymous
Nobody wants anyone looking into their finances. Your finances are your business. Bitcoin is anonymous, meaning although Coinbase might know who you are, they don’t know why you made the transaction.
That is not necessarily true: every single bitcoin transaction is readable on the blockchain so even if you don't know who is making that transaction you can follow the bitcoins path anyway. And it's possible to track down bitcoins even after they have been mixed using some mixing service. If you want to be 100% anonymous then bitcoin is not the best choice. At the end almost everything that goes through internet leaves a trace.
Ale88, your statement is far from the truth. The advantage of bitcoin is being your own bank, but it doesn't necessarily provide anonymity as you claimed. If you really want to be anonymous in the bitcoin network, you must first learn how to hide your ip. This can be achieved by not running your node on the clean net. Tor can do a good job to hide your ip. For transaction purposes, you try not to re use your addresses.
The coinbase example is off the discussion because coinbase is a CEX. To be able to trade their you must have already completed KYC with them.