E-Commerce on Blockchain

Please, I want to know more about the use case of the Blockchain for ECommerce.
If I buy an Ecommerce script, and install on a website I have registered with a Cloud hosting company, does that mean I now have the ecommerce site on the blockchain or must a coin be created for this to work?

I could be wrong, but if you use a cloud company, your information will be stored on their servers. The information will not be decentralized in any way, nor will they have the benefits of a blockchain (immutability, append-only, security, transparency, etc.).

Here is a detailed explanation as to where a blockchain needs to have a native coin: https://medium.com/@pavelkravchenko/does-a-blockchain-really-need-a-native-coin-f6a5ff2a13a3