VPN for My Store

Is it legal to run an ecommerce store in the United States through a Malaysia VPN? Can a VPN provide the necessary security for online transactions for my ecommerce store?  Is using a Malaysia VPN the best solution for my ecommerce store to access the US market? What are the potential risks of running an ecommerce store ? Can a Malaysia VPN help overcome geographical restrictions for my ecommerce store? My friend who is already work as freelance with using Spain VPN and earn smart income. How can I ensure a smooth and secure experience for my customers ?