In coming 100 years we will surely see one more financial crisis and that will be the time when cryptocurrency will boom and it can also become main steam of currency. So the price can be unimaginable. This can happen in next 10 or 20 years also as we dont have to wait fr 100 years.
In 100 hundred year time, I believe that blockchain technology and cryptocurrency would have been 100% adopted and would have already solved many problems that would ache led to the financial crisis you talked about; we might not even see such financial crisis in existence.
One of the benefit of cryptocurrency is not to serve as payment processor alone, majority of us have already used it to solve on or two of our financial crisis that would have been left unresolved without cryptocurrency, and as each and every one of us keeps doing this, it will reduce the impact financial crisis will have on the economy in the future, till its uniformly disappears.