Can anyone give me some answers on two major problems I see with bitcoin/crypto: - Not decentralized (51% attack, even worse with PoS), still subject to manipu

Can anyone give me some answers on two major problems I see with bitcoin/crypto: - Not decentralized (51% attack, even worse with PoS), still subject to manipulation therefore - Privacy, transactions can be traced back, therefore they can be censored/rejected At least with plain cash I can have anonymity.