As far as I am concerned, easy:
1. Print 16bn fantasy-money that ppl believe in
2. Buy/Trade BTC with that 16bn, let the price go up
3. Have people post-rationalize the rising price and let them draw lines in their charts and stuff and support news talking about 300k+ price and have nobody believe it will stop at around 20k
4. Sell everything you bought for around 20k within a month
5. Price goes down again, but now you are now some billion USD richer.