I think most people are beginning to see bitcoin is not anonymous and becoming increasing centralized.
As for cryptology, there are many other coins offering the same feature.
Btc is not anonymous by itself, but it can be anonymous if proprely used. FIAT transaction cannot be anon, unless you use physical cash.
Also, decentralization can be achieved with btc, with fiat u need a central bank, no matter what.
these are big differences..