Like this: I approach either the guy or girl playing the guitar whilst singing a song in LA or the performer break dancing in NYC, and put in a 10,000 (Kuwaiti) Dinar [~$32,610] tip or equates to 5 stacks in cash since the max is 2000 KD in a single one, but will they appreciate a tip that massive in foreign currency?
However, even though it’s non-$: can it still be stolen as it’s just sitting in their tip jar? When accounting for currency conversion: if it was stolen, would that mean the thieves end up getting more than anticipated? Do you give money to either street performers or musicians if their performance is good?
Hand it to them personally at the end of their set. It gives you the opportunity to thank them in person and explain the value of your “tip”.