Quote from Ivanovich:
Honestly, I cannot - for the life of me - understand why limiting margin to 100:1 is a bad thing.
In theory, it will mean fewer participants which reduces liquidity. In practice, I'm not sure if it will matter.
Why does the government need to protect citizens from losing their money? If they have large losses due to excessive leverage, that's their problem. Know the ropes before you dive in.