We can use wordpress for an ecommece site. In order to do that we will have to use ecommerce plugins like woocommerce. Sadly, webmasters do not ho with wordpress for ecommerce site. they say wordpress cannot handle big trafic. If you are planning to launch a lite lile ebay or Amazon with thousands of visitors every day, wordpress will never able to handle that kind of traffic. Is this true?
WordPress can handle anything. If just needs to be done right.
National News stations and Television stations have been using WordPress for years. Imagine how many daily users they have reading news articles, watching shows, and commenting.
WooCommerce...there are many stores with thousands of products that work flawlessly...some even in the range of 400K+...no issues.
With any system or CMS, it's all depends on the setup behind it. For such needs, Nginx does a better job than Apache. An optimized database, and a good cache in place will do wonders for traffic. The only exception with the cache would be WooCommerce since it needs to be dynamic, but if everything is configured properly, and with the right amount of RAM and SSD's, one will have no issues.