You need to do more research. Traceability is inherent to crypto (except some specific coins like Monero).
Getting rid of middlemen and giving back its financial sovereignty to the individuals is the ideal outcome but, most probably, the global banking system will adapt is adapting and will be merged or co-exist with crypto.
Crypto is classified as "digital asset" in Thailand.
AFAIK assets or digital assets remittance does not trigger a tax event in Thailand (unless it is considered as a payment for work), only income remittance does.
Nor I read anywhere in the tax law that assets cost basis has to be reported or some Thai WHT be applied at remittance.
Capital gain tax event will be triggered when the imported asset is sold, using the asset purchasing price (be it from abroad).