See the Howey Test:
https://www.investopedia.com/terms/h/howey-test.asp
Airline Miles don't grant you access to a portion of the profits from the airline. They aren't an investment. They are a currency for future travel.
Airline Miles don't grant you access to a portion of the profits from the airline. They aren't an investment. They are a currency for future travel.
Same as gift cards.