As of June 2024, narrow money ($M_1$) constitutes 20% of broad money ($M_2$), which was reported to be Tk. 4,20,680 crore. If demand deposits make up nearly 50% of $M_1$ and you are given that time deposits account for a certain percentage of broad money, how would you calculate the currency outside banks? What are the implications of a large portion of demand deposits on the overall liquidity in the financial system? Additionally, explain the role of time deposits in determining the stability of money supply and its impact on the inflationary pressure.