Cryptocurrency mining machines • English Conversation Questions

What are the most popular cryptocurrency mining machines currently on the market?
How do mining machines differ in terms of their energy efficiency?
Can mining machines be used to mine multiple types of cryptocurrency, or are they specific to certain types?
What are the costs associated with setting up and maintaining a mining machine?
Are there any portable mining machines that can be used on-the-go?
What are the main components of a cryptocurrency mining machine?
What is the difference between cloud mining and traditional mining?
How does the difficulty of mining a particular cryptocurrency affect the profitability of using a mining machine?
What are the risks associated with cryptocurrency mining machines?
How do you measure the hash rate of a mining machine?
Can you build your own cryptocurrency mining machine or do they need to be purchased pre-built?