You can use the following ideas:
1. Start with brief introduction about crypto currency followed by basic and fundamental information about Bitcoins.
2. Write about the origin and starting of BTC in trades and investments.
3. Talk about the golden time of Bitcoins (about 2017)
4. Talk about how Bitcoins can be used in trades and investments. Starting from a small person to person trade to a big million dollar company trade.
5. Talk about the state of Bitcoins now , their future predictions and stuff.(you can use coinpredictor.io for that)
6. Conclude with how it can be a very useful tool for the current and coming generation and how it can totally change the way of economic.