How is it possible that Bitcoin is a stepping stone, when the code is open source and can change? It's not stuck and frozen in time, it can evolve, right?
wrong... the bitcoin core devs have stated many times they wont change anything unless 100% necessary! so yes bitcoin will stay the way it is unless something comes along and threatens the protocol and demands a change to the protocol!
I noticed from this talk (
https://www.youtube.com/watch?v=kIy2Fw9xjuk#t=819) Andreas says basically to paraphrase 'Once Bitcoin goes mainstream
it won't be able to change in 10 years' ... starting at around 21 minutes in the talk
However, he says after implementation of anonymous transactions in the core protocol - all other innovation and code should be added to layers above the core protocol