Every year, VC in the US _as a whole_ invests roughly 100B [2]. If you cut out non-growth and non-tech sectors I'd guess that number total goes to around 40B, and roughly 100B (very rough number) globally.
So yeah, some money gets "wasted" but it creates huge market capitalizations that are around two full orders of magnitude larger than a single years investment, and growing strong year over year.
[1] https://www.investopedia.com/terms/f/faang-stocks.asp [2] https://www.prnewswire.com/news-releases/us-venture-capital-...