If your system configuration is good you can install two os

If you want to install two os in your system no problem ,but inorder to get the speed and stay away from system error you should do in this way

Install the two os in two different disk drives(local disk), because if you install under single local drives the system required hidden files by both os will collide and there arises the problem for your system.

Nothing wrong in installing two os if you have pc with googd configuration (good processor ram memory etc)