I really doesn't understand what you mean that "Bitcoin is becoming kind of centralized with the involvement of an increasing number of centralized institutions". I would understand if you say 'centralised miners', but that's another discussions.
And you can' really compare any tokens or Altcoins to bitcoin though, totally different and I don't think that we will have successor to Satoshi's invention as far as support and adoption from the community.
People buy and sell Bitcoin through exchanges, most of the centralized exchanges require identity certificates nowdays. In that way, Bitcoin transactions become dependent on centralized exchanges, and some regions set limitations on Bitcoin transactions by controlling exchange platforms.