For example, speculation about the Chinese Yuan devaluating has, in the past, caused more demand from China, which also pulled up the exchange rate on U. The Bottom Line. Cryptocurrency Difficulty Difficulty is a parameter that bitcoin and other cryptocurrencies use to keep the average time between blocks steady as the network’s hash power changes. Buy Bitcoins The above information should not be taken as investment advice. Throughout its history, Bitcoin has generally increased in value at a very fast pace, followed by a slow, steady downfall until it stabilizes.