Other player:
Start the game in one player mode. Choose to play blackjack. Press B, answer that you do not want to play that hand, and repeat. Keep doing this until someone appears.
Quick final win:
Bet and save after winning to accumulate over $100,000. Bet the entire amount on a single Black Jack hand. Reset and bet again if you lose the hand. Repeat this procedure to accumulate $10,000,000 in winnings.