Yumthai

https://sherrings.com/gift-tax-law-in-thailand.html

Those happily married to a Thai national can transfer (in this case from abroad) to their spouse up to THB 20 million in value per calendar year tax free as a gift.

Indeed! Why bother taking the risk to make crypto payments or directly cash out into a Thai bank account without declaring it, as legal and tax free options exist abroad? Even if Thai taxman can't or doesn't want to enforce laws now, the issue with blockchain is traceability and transactions history being engraved within the chain. Hence, they could easily investigate people transactions at any time in the future, then retroactively fine them.

Are you saying that you're willing to pay up to 35% personal income tax on all crypto payments/transfers you do? It seems to me that the most reasonable and legal solution (unless of course you declare nothing) is, as @Jenkins9039 mentioned, to keep and cash out crypto abroad (broker and bank accounts outside of Thailand) then remit fiat money tax free the next year(s) into your Thai bank... am I missing something here?