There is a very big fault in this your description. Cryptocurrency is made up of bitcoin and others which is called alternative coins (altcoins). So it is not fine to list altcoin as if there is a particular coin called an altcoin.

Compared to fiat, bitcoin is not fast and not easy to use. You have to set up a wallet and the task of setting up a secured one and learn how to transact.

For anonymity, it is privacy coins that does that. For bitcoin it lies in the hand of the user not to reuse addresses or tie their address to their identity. Also other methods are applied to improve anonymity,  such as bitcoin mixing.