Hope you are right, this transfer from middle class to rich already happened for the early cryptocurrency adopters.
This is not, what cryptocurrency is about. There are many examples, like Bitcoin creator Satoshi Nakamoto (this is a nickname, still the real person or persons are unknown). Charlie Lee, the creator of Litecoin, sold all his Litecoins, because, owning them, will influence him, in the Litecoin development. So instead of trying to make a good product, he would build to maximize profits. By selling them, his mind is clear and focused to development. So, the "become rich" dream, is not the dream of the most cryptocurrency developers.