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.
I think that has happened in almost every century long period. The financial crisis in 2008, back in the oil price shock period and in the end of Second World War in 1930. So yeah you can expect a financial crisis in the next 100 years as well. And yes there is possibility of great surge in the market value of cryptocurrency and I think that would be the time when crypto will spread more to places where it is not recognized.