So a collapse of the ecosystem will lead to challenges for humans. You can't eat bitcoin once the bees are gone.
There is even an entire group of technology optimists that e.g. think we might be able to break ground on another planet before the effects of us handling earth are realized.
In my opinion however, it will be tremendously hard to find working alternatives at the scale of feeding 8 billion people, across the entire world. I also expect that the effects will cause issues faster than we can adapt. As such it would be much better to prevent the issue as much as possible than to try and find working alternatives under time pressure. Once the effects start showing themselves and shortages become a reality, we will start seeing climate refugees, climate wars, etc etc.
But maybe we will succeed, maybe only 7.5 billion people die off and the rest can live another day up until the next mass extinction event.
I suspect that you might not be the best informed person out there.
It's like talking about alternatives to soil: There are alternatives to soil, but you can't just quickly replace all of the Earth's vast food producing farms with a technology alternative without serious consequences, and if soil stopped working overnight, billions of people would die.
Bees aren't disappearing overnight, but they are disappearing worryingly quickly. If it carries on, losing bees is a very serious issue for our food supply.
edit - please don't let this dissuade you from googling information on basic subjects. But also be aware that if you find yourself doing so, then you know very little on the subject and cannot at all rely on intuition.
Make homes for native pollinators[0]
Stop using Neonicotinoids and other pesticides [1]
Find ways to stop stressing out honey bee's used for pollination[2]
[0]https://www.honeyflow.com/resources/blog/what-is-the-pollina...
[1]https://xerces.org/neonicotinoids-and-bees/
[2]https://en.wikipedia.org/wiki/Colony_collapse_disorder#Possi...