There are a lot of minor threats to monetary systems that blockchain does not address. Bitcoin addresses the rare but fatal threat of hyperinflation (runaway inflation). Historical examples https://en.wikipedia.org/wiki/Hyperinflation#Notable_hyperin...
The only known solution to this threat is not have a single supplier of money (i.e. a lot of independent miners digging metal out of the ground, or the block chain equivalent)
The only known solution to this threat is not have a single supplier of money (i.e. a lot of independent miners digging metal out of the ground, or the block chain equivalent)