PORTUGAL
* 0% tax on crypto trading
* 0% tax on foreign-sourced dividends
* 0% tax on foreign-sourced income
* 10% tax on foreign-sourced pension
* 20% tax on freelancing
* No minimum stay requirement
* Permanent residence can be granted after five years of residency.
SOURCEPortugal's offers look relatively good in terms of tax, am not sure about UAE, Turkey, Switzerland, Singapore, etc tax structure on crypto, The website did not really give many details on that aspect, you can always do more research on them to be sure.