SCB updated their card terms to cancel your card if you use it for Forex, crypto etc


Well-Known Member

Refuse to authorize any transaction for which you want to use the credit card; For the purpose of illustration, we may choose to cancel, suspend or refuse to authorise transactions if the credit card is misused or a prohibited transaction like overseas forex trading, trading in crypto currency etc. are carried out. These are in addition to termination and suspension rights available to us under the Client Terms.​

Etc means they can cancel the card for any reason now I guess.