We are at the beginning of a paradigm shift that will still take years/decades to unfold.
Yes, which is why there is so much value to get in early and learn about where the future will be, but it is definitely not to late to start.
I wonder when the first house will be bought with crypto?
I know that there are some auction houses that are taking crypto and an Australia classic car sold for Bitcoin a couple days ago :)
And what would the legal implications be?
Much of this is yet to be discovered, but it is a process. Once the value starts getting generated in crypto, the legislation surrounding it will have to shift, as the wealth doesn't care much about borders at that point.