Virtual Private Network Discussion Essay Assignment

I need support with this Engineering question so I can learn better.
Question 1:
What are the main reasons why a VPN is the right solution for protecting the network perimeter? Do they also provide protection for mobile devices? If you do use a VPN, which one and why did you select that particular one? As always it is due 2359 Saturday Eastern Time.
Reference: https://www.forbes.com/sites/leemathews/2017/01/27/what-is-a-vpn-and-why-should-you-use-one/#647be6f04b8f
1)The vast majority of the population associates Blockchain with cryptocurrency Bitcoin; however, there are many other uses of blockchain; such as Litecoin, Ether, and other currencies. In this discussion, please describe at least two cryptocurrencies with applicable examples. Discuss some similarities and differences. Lastly, discuss if you have any experience using any cryptocurrencies.