There are some discussions here about buying Bitcoin in different countries. So, for all who have bank accounts in Thailand!
I also see that for those in Thailand but without a bank account can use a cash terminal to load an OKPay account.
Commission charged is 10%. Thai baht bills will be automatically converted to USD and transferred to the specified OKPAY Wallet instantly.
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https://www.okpay.com/en/company/news/fund-okpay-with-cash-in-thailand.html