Been asked a couple of times, what problems does cryptocurrency solve, and what’s its unique value proposition compared to other cryptocurrencies or traditional financial systems. Would love any other users take on this ..
The main problem which can be solved using cryptocurrencies is the global test of blockchain algorithm, so we can say that
BTC and alts are actually enormous testnets. Optimisation solutions can be used later for financial soft an hardware development. Secondly, the total amount is limited, so blockchain systems bring some other experience which can be useful: the money system with no inflation. This is also an important thing.