If you're a Thai tax resident and you have crypto investments in a foreign crypto exchange. You then earn income/capital gains on these foreign crypto investments while being a Thai tax resident, but, you never transfer that foreign income into Thailand, do you have any tax obligations on that income in Thailand?
On the one hand this post says that you do not pay any tax on foreign income that is never brough into Thailand. But, then it also says that it doesn't matter if you bring your foreign income into Thailand or not, as long as you earned the foreign income while being a Thai tax resident you need to tax it in Thailand. Maybe someone could clarify?