>How is it possible to keep a private key private, if you have to use 3rd party hardware and software (no one builds their own computer components), to use the

>How is it possible to keep a private key private, if you have to use 3rd party hardware and software (no one builds their own computer components), to use the key? It isn't. And this is the fundamental problem with using crypto for its' (professed, intended) use of a trustless currency. In order to actually do that, you need to run a full node on your own hardware. However no one wants to do that, so we've literally just reinvented the existing trust based banking system on top of it all, with the added benefit of zero transparency or regulation.