Expected Value is a key concept in gambling theory. In some cases (like poker) it can be estimated fairly well. In blackjack it can be rather precisely calculated (depending on the game rules, playing perfect Basic Strategy, a bet of $1 has an Expected Value of about $0.995).
Every $1 bet on a lotto game has an Expected Value of $0.50, the State takes a massive rake.
Crypto bets are all but impossible to calculate an EV for but the gambler in me guesstimates that money put into crypto is a better bet than money wagered on lottery tickets.