Cryptocurrency- this is essentially 'digital money', produced using hardware and software, not controlled by a bank or government. There's a multi-trillion market in this stuff and a few hundred variations of cryptocurrency. The best known and most valuable is 'Bitcoin'.
Power- it takes a huge amount of energy to produce a unit of cryptocurrency (Bitcoin in particular).
Entertainment- the act of producing a unit of Bitcoin might be entertaining to some (they are very valuable, with a market value of around $60,000+ each, and hard to produce). Others might enjoy the market fluctuations, seeing their holdings increase in value (not so much fun when they decrease...). Others almost certainly gain entertainment value when they cash their holdings in to realise a large gain- apparently (possibly an urban legend), in the VERY early days of Bitcoin when they were worth fractions of a thousandth of a dollar, a pizza delivery guy was offered a choice between a $5 tip and a something like ten thousand units of Bitcoin.
Engine or battery powered- you need energy to produce these things. I'm pretty sure that 'plain electricity' is used by most producers but it might be possible that back-up battery packs/ generators are also available.
Power- it takes a huge amount of energy to produce a unit of cryptocurrency (Bitcoin in particular).
Entertainment- the act of producing a unit of Bitcoin might be entertaining to some (they are very valuable, with a market value of around $60,000+ each, and hard to produce). Others might enjoy the market fluctuations, seeing their holdings increase in value (not so much fun when they decrease...). Others almost certainly gain entertainment value when they cash their holdings in to realise a large gain- apparently (possibly an urban legend), in the VERY early days of Bitcoin when they were worth fractions of a thousandth of a dollar, a pizza delivery guy was offered a choice between a $5 tip and a something like ten thousand units of Bitcoin.
Engine or battery powered- you need energy to produce these things. I'm pretty sure that 'plain electricity' is used by most producers but it might be possible that back-up battery packs/ generators are also available.