I really don't understand what do you exactly meaning by international transfer. But if I say from my own self that " There will be nothing wrong if the source are not illegal, in this case the source of fund is the main fact.  Then you need to know how the country accepts cryptocurrencies where you are going to transfer your funds, many countries in the world have not yet legalized cryptocurrencies, if you transfer your funds on those countries through cryptocurrencies, then you may face problems.