I think that's overstretching a bit. Bitcoin is amazing, and solves a major problem (our reliance on a bad banking system). But it's not without its own challenges. There's still a lot of work to do to make it more mainstream and easier to use. Blockchain in itself is also an exciting technology that can be used to solve lots of problems and has several use cases. But saying that bitcoin or blockchain will solve the world's problems is overhyped. Can blockchain help solve some of the world's biggest problems? Yes absolutely. Especially when we start looking at how it can be combined with other emerging technologies.
It's an exciting time to be living in! Ultimately it will be teams of people around the globe who will solve the world's biggest problems.