How safe would it be to buy from say, alphabay, using my android phone running orbot and orfox along with a VPN? Can I buy bitcoins and store them on my phone? How secure would this be? I already created an account and browse alphabay with my Nexus 5x running orbot and orweb with a vpn. It would be a domestic Canadian order aswell
Yes.
Is it a good idea? Fuck No.