Decentralized ones are rare. There are lots of centralized blockchains. The centralized ones, with their cheerleaders of pump and dump get rich quick schemes,

Decentralized ones are rare. There are lots of centralized blockchains. The centralized ones, with their cheerleaders of pump and dump get rich quick schemes, are constantly trying to convince the unaware that they have the same security model as the decentralized ones. They don't.