VPN won't help you much trust me, if the security agencies of your nation wanna find you; VPNs can't do much.
I sincerely think that running a dedicated tor node for the purpose will be better than spending money on VPNs.
Yea, VPN doesn't do anything. Anyone who has a little knowledge about Cybersecurity will know that a VPN is almost as good as useless. Doesn't do you any much good. And never combine Tor and VPN. If you are in a country where cryto trading is illegal, please do not break the law by trying to trade just obey the law. It is only a person who has freedom that can trade, buy or sell cryptocurrencies.