Nonsense. They can get hacked or introduce a bug into their stack and go bust in under an hour.
That's extremely unlikely, but not impossible.
I might tone it down just a bit to "Somewhat unlikely to happen. Today."
You can calculate your annualized failure rate. That's a best-case on the odds your funds will continue to exist next year. Move fast / break things / fail fast / developer sprints / etc. speeds this process up even further. Crypto companies also have a giant target painted on their backs for hackers (including rogue state-level actors, some of whom just had large sums confiscated by Western institutions).
Tulips, anyone?
I’m not saying it’s risk free, but what exchange or broker is? Does anyone else match Coinbase for security? Gemini seems at best equivalent.