Even then, you could argue it's still an ongoing experiment (like literally capitalism and communism themselves; both are mass adopted and in a way still experimental).
Let me explain: every time a milestone is reached, like 'legal tender', 'mass adoption', 'global reserve currency', ..., the circumstances are completely changed and we're in a new kind of experiment.
A very interesting food for thought. Yeah, we're definitely going experimental with every single new addition. Anything new could turn into opposition or support from certain parties, and stuff like SegWit is
definitely a new atmosphere, a new environment and a new experiment. Thanks for your input. If so, since Bitcoin can be easily changed by just modifying its codelines unlike for example physical materials such as lead or gold, it might in fact be experimental
at all times and will be even 100 years from now.