Can we categorically call this over a decade mistake?
Bitcoin have got just a little above a decade on its existence and with that been the case, it’s too soon to consider this to be some periodic error. Perhaps a more short term approach based on the halving would have been appropriate.
Even with that still, a decade comparison between what would have been a possible expectation from these fields of investment is still an interesting and teaching moment on how opportunities aren’t been taken.

Meanwhile, I might understand why you don’t really have a statistics to prove on real estate but, it would have been interesting to find one.
Even so, you wouldn’t find a $1000 real estate investment that would be very promising in 10years. It’s really rear to have that and you must be real informed to have that sort of investment or perhaps just caught up with luck.

When it comes to Bitcoin,
It’s a whole different story. All you need is to buy and hodl. It’s periodically through the halving and in its short time beat imaginations and what is obtainable in any field of investment. What stops people from doing proper research to have a sense of security and pick up a Bitcoin investment. It’s an asset and currency, get it while it’s still accruing to itself values, you ain’t late.