Found startup, get acquihired in a year for $10M. There's risk involved, but there are certainly people who have managed to do this.
There's a number of other ways of varying risk/time/shadiness tradeoffs. Start VC fund, have $1B exit, cash out $70M carry in 7 years. Start hedge fund, raise $300M, earn 12% returns for 7 years, cash out $70M carry on $360M profits. Find a DeFi exploit, hack Ethereum, earn $300M in a 10 seconds, hope the Feds don't catch you. Lever up on real estate, put 3.5% down on 100 $300K properties, turn $1M into $20M as they've gone up to $500K over the past year.
