Buy sperm from the most talented males in various domains of economic interest. Then offer poor women from all over the world money and citizenship in exchange for surrogate prengancies with said sperm.
Give the resulting children a top-notch education. Their human capital will then be taxed normally, to refinance the expense.
Any rich-country government could do this.
Cryonics is as useful for the world as letting any other refrigerator run without a useful function.
That is, it is waste. Still better than some other ways to spend money, but worse than spending it on entertainment. Because at least that’s entertaining.