Why should I move virtuemart to magento?

With beginners who have no or little ideas about technique, VirtueMart seems to be preference because it is pretty easy to download then set up. On the other hand, Magento requires more complex skills and even preparedness. This complication, in contrast, brings great power with plentiful features which make your store become the giant!
So, if you agree to spend time or a little money for Magento setup, it is certain that you are about to be a big boss owning powerful business!

Moreover, you can consider:
VirtueMart to OpenCart
VirtueMart to Shopify