For those who didn't start investing back then it's irrelevant.
I started investing 5 years ago, so that's relevant to me and loads of boring, safer investments have beaten Bitcoin, easily.
Over the next 5 years or 50 years who knows?
From a risk to reward point of view, Bitcoin has sucked over the last 5 years, basically. You could loosely call it investing.
And earlier that that, it was even more speculative and risky.
A few people got lucky, pretty much summarizes it.