BitCoin is by far the most widely accepted and successful decentralized crypto currency in the world, and is today accepted by more than 100.000 companies globally!
A number which grows on a daily basis.
But first, - what does "decentralized" mean?
When I write this we probably have more than 600 different crypto currencies in the world. By far most of them come into the category "decentralized" while a few, like OneCoin for instance, falls in the "centralized" category. Let me start by saying that I am a huge fan of the "decentralized" version and have in fact, on a more long-term basis, much less faith and enthusiasm for the "centralized" versions. Although, I do admit, they will probably also play an important role in the transition from "fiat money" as we know it today to the "digital currencies" most of use will use tomorrow.