You pointed out that btc mining is dominated by a few groups that is irrelevant as they cannot mint more than 21 million btc into existence unless all miners voted to undo this which they aren’t very likely to do because their votes have to take into consideration all constituents of the chain since they derive their income from them even if they decided to do that I could still just choose to use a version of the chain that does enforce the rule/use another existing chain/even create another currency myself in the traditional finance world if my country’s central bank decides to raise their inflation rate to 50% I cannot remain on a version of the currency that maintains the 7% inflation rate in a lot of developing countries around the world central banks do exactly this and citizens have zero means of recourse yes they could the usd, euro etc but the government could expropriate this as well and this has happened in argentina and other states. I support btc, cardano, ergo, oxen monero and nym none of which are listed in the op. Decentralised finance because of the decentralised nature obviously doesn’t have the same legal protections and other advantages of traditional finance and this is known from the getgo just like with traditional finance you’re told the benefits and drawbacks and it’s up you the user to make your choice no one in either sphere is holding a gun to your head saying you must use my particular bank/blockchain/defi application for defi you can have the option of being able to view/modify the source code of the blockchain/smart contracts ( the only notable exception to this being legal tender where states compel you to use a particular currency/ies whether fiat/crypto to pay debts, fees and taxes in)