Give credit to whom it is deserving. Milton Friedman was a legend in the world of economics and his theories helped to shed more insights on how a perfect economy should look like. You seeing his works as evil may be stemming from sentimental reasons and you are entitled to your opinions but I don't think is be out of place if I call him a hero.
The theory of monetarism asserts that the supply of money is the primary key in determining inflation or deflation in an economy.
 We know Bitcoin acts or can be used as a hedge against inflation and all that and Milton, by introducing the theory of monetarism is trying to say that when you control the supply of money channeled into an economy, you tend to curb inflation, which seems like the same thing to me.
 A typical example of monetarism can be seen in monetary policy. Take for instance a situation where the Central Bank raises it's interest rates to make it expensive and in turn dissuade people from taking loans, that way it has lowered the risk of inflation.