While the Mario "ding" is the most famous, the "coin beep" has evolved alongside technology:
Sounds with a low attack (fast startup) and quick end-cutoff feel "snappy" and rewarding. video_game_coin_beep_sound_effect
The sound was created by playing an octave or fourth interval upward at a fast tempo. While the Mario "ding" is the most famous,
The "Ding": The History and Psychology of the Video Game Coin Sound Effect allowing for more realistic metallic tones.
The coin sound effect is inherently satisfying, tapping into human psychology:
Sounds became richer and more varied, allowing for more realistic metallic tones.