You had better hold IOTA for long-term investment. This cryptocurrency is created for the Internet of things and it brings new radical ideas to the industry. One of these ideas is the replacement of the blockchain with a directed acyclic graph. That is, instead of a single chain of blocks, the technology uses multiple chains at once. This solution allows the system to scale up indefinitely and process as many transactions per second as humanity does not even need now. But one detail – the coordinator – slightly overshadows the picture. Yes, this is a classic central server that checks the correctness of all transactions and has unlimited power in the system. And although the developers claim that the coordinator is needed only until the network gets stronger, and in the future will be removed, at the moment the system is centralized.