The government of Thailand decided to impose restrictions on any currency sales of $20,000 or more, unless the purpose of the sale is for trade.
Setting trading limits killed their trust with the markets in one move. Now they have to go back and start building trust again, and it will never be the same. Contrast this to Lula in Brazil, who was just named the best president in history or some such silly thing. The didn’t trust him on day one, now the markets love him.