Cryptocurrency is better than traditional for some reasons. Same as that we can find traditional money to be better than cryptocurrency for some reasons.
Few of the reasons why I find cryptocurrency better is the decentralisation, transparency, increased efficiency and no inflation due to the limited supply.
Reasons on which traditional money stands better, ease of usage due to the physical paper money. Zero transaction fee on purchase/buying of products and services.
We haven't yet arrived at increased efficiency unless you are a huge Bitcoin holder and are transferring larger sums around the world. Yes, then there is no doubt you made the right choice with Bitcoin, but you could also use a cheaper cryptocurrency with sufficient liquidity to do that. For those who have only a little bit of Bitcoin, we can't really claim that Bitcoin is more efficient than traditional money, depending on what you are referring to with efficiency. If it is speed, then yes depending on the purpose Bitcoin is supposed to fulfill. Buying a cup of coffee sucks, sending money from Asia to Europe or vice versa it is great. We don't need to talk about the costs to do that though.