$BTC There are several ways to make money on the fall in the Bitcoin (BTC) rate:

1. Short Selling: Shorting Bitcoin means borrowing coins from a broker and immediately selling them on the market, expecting the price to drop. Then, when the price does drop, you buy the same coins back at a lower price and return them to the broker, making a profit on the difference between the selling and buying prices.

2. Binary Options: Some exchanges offer binary options, where you can bet that the Bitcoin price will fall below a certain level by a certain date. If your prediction is correct, you will receive a fixed payout no matter how much the price falls.

3. Futures Contracts: Bitcoin futures allow you to enter into a contract to sell Bitcoin in the future at a predetermined price. If the market price of Bitcoin is lower than this price, you can profit from selling at the higher futures price.

4. Margin Trading: Using leverage, you can open a position larger than your capital. If the Bitcoin price drops, you will make a profit that exceeds your investment. However, you should be aware of the risks of margin trading, as losses can exceed your initial capital.

5. Arbitrage: Arbitrage transactions are possible on different exchanges, where the bitcoin rates may differ. You can buy bitcoin on one exchange at a low price and immediately sell it on another exchange, where the price is higher. The difference in rates will be your profit.

It is important to note that any trading activity is associated with high risks and requires careful market analysis and the ability to manage your risks.