You can use a binary option and probably do better than the 3% spread at the roulette table. Having said that, I don’t know of any exchanges with the instrument you’re looking for, so you’d probably have to go OTC for the instrument and maybe pay a broker’s commission + prop desk spread, so you wouldn’t save too much. Bear in mind you don’t need the full $1mm—you only need $1m/annual interest rate.
You can use a binary option and probably do better than the 3% spread at the roulette table. Having said that, I don’t know of any exchanges with the instrument you’re looking for, so you’d probably have to go OTC for the instrument and maybe pay a broker’s commission + prop desk spread, so you wouldn’t save too much. Bear in mind you don’t need the full $1mm—you only need $1m/annual interest rate.