Just look at what an investment in BioNTech would have done if you bought in October 2019:
https://www.google.com/finance/quote/BNTX:NASDAQ?window=5Y
You'd be 25x in less than 2 years.
How convenient for the Gates Foundation to invest $55 million in September 2019! https://investors.biontech.de/news-releases/news-release-det...
The chief innovation of mRNA vaccines is that instead of using expensive egg cultures, you can reproduce viral proteins inside the vaccinated patient themselves. This presumably means much cheaper manufacturing.
Additionally, you can drive long-term vaccine sales, since antibodies based on a single protein (spike) are more likely to fail compared to immunity based on the complete protein structure. We're already seeing this now with the 'need' for booster shots in response to variants driven by these leaky vaccines.