Here are the things that I would target first:

1. Make sure to get my hands on as much classified information as I can and then let the internet run red with it. 

2. Make sure to pull the rug out from under the banking system. I woudn't try to harm the banks but rather expose their flimsy stability to the public and let them know that they are in for a rough deal if they are trusting the banks.

3. I would not touch the fiat money - too many lifelines connected to it. I would rather make sure to get things in place that would ease the transition from fiat to crypto.