Monero has some strong points, but it's actually LESS decentralized than Bitcoin. A Monero confidential transaction is 1.5kb while a Bitcoin transaction which is only around 300 bytes. For the argument of decentralization, it doesn't matter that it doesn't blind the amounts or add decoys inputs, the 5x size of a transaction itself means that the chain is much bigger than Bitcoin under the same load which makes it less decentralized due to much higher storage requirements for a full node. It's also much slower to verify the history because of all the rangeproofs that need to be validated for all outputs that have been ever created.

Honest question because I don't know much about Monero: can you build layered networks like Lighting on top of Monero as you can with Bitcoin? If not, then Monero seems a non-starter for a global currency/payment system.