Insurance is just a financial product. Subscribers pay premiums; the insurer pays out claims. In between, they're sitting on a pile of cash that you could earn some returns on, which could theoretically benefit both the insurer and the subscribers, since investment income could boost profits and/or reduce premiums.
However, you'd expect them to invest in low-risk assets, with stable returns. I can understand taking on a little more risk, in a blended approach, but it does seem a bit extreme to go investing in startups. However, as the article mentions, perhaps they see it as more than a pure asset, and are instead focused on developing technology they want to use for the sake of their own claims and risk-analysis processes.