Busker Trophy in Baldur's Gate 3

Earn a hundred gold from playing sweet, sweet music in a single playthrough.

Bronze trophy1.6% of playersUltra rareBase game

With an instrument equipped, the Perform action plays to the people around you. When the Performance check succeeds, they toss you coins once you stop playing. The trophy needs 100 gold from this in one playthrough.

Leave it for Act 3, when crowds are everywhere, and do it in one go:

Use a Bard with Expertise in Performance and high Charisma. A hireling from Withers, the skeleton at your camp, works (see Outsourcing).
Send the Bard's gold to camp first, so the coins they carry are the count.
Perform for each group of people in Rivington and along the road towards the Lower City of Baldur's Gate. Stop once the check has rolled, collect the coins and move on.

A failed check earns nothing, so try the next crowd. Two or so walks along the road are enough.