Bitcoin is decentralized... the antithesis of bitcoin is really centralized websites and authorities.
As rapidly increasing Bitcoin utilization causes bloat and complexity, centralization is a natural consequence. Already we see centralized constructs reached for as a problem solving means since it is the quickest and most obvious way to solve many problems. (Leveraging state issued passports and SSL cert authorities for instance.)
I posit that a more healthy way to go is to jealously and rigorously guard against centralization at a 'first tier' or 'core' or 'native' level. And to do this by
actively embracing and facilitating centralization at a 2nd tier level. This to take the load of growth as well as the risk of additional bells and whistles at this second tier level where failure does not result in a collapse of the entire solution.
Ultimately what
I want is an unassailable 'native' Bitcoin which looks much like we see today. I'll keep the bulk of my value in deep off-line storage relying on nothing more than the 'first tier' which is light weight and can realistically be operated by independent enthusiast who risk little capital by operating the system.
For general day-in/day-out use I'll choose a handful of promising 'second tier' organizations who seem to be trustworthy and risk a certain fraction of my wealth with them. Currently I do this with Coinbase and Blockchain.info for instance. If they fold or get shut down I may lose, but I lose no more than I choose to risk and my nest-egg is safe with my plain old no-frills deep storage wallet which I rarely dig into.
The alternate of trying to support an economy which could basically need to grow without limits in a native 'first tier' Bitcoin layer is very dangerous and I believe almost certain to fail. And fail because it will almost certainly centralize out of necessity and thus become more prone to successful attack.
A multi-tiered system still relies on Bitcoin as the foundation upon which it rests, and is still available in native form when really needed so evolving in that direction is not 'selling out'. It's simply a logical way to scale and grow while remaining hardened against centralization and the brittleness and risks that that condition brings.