Ah, I can understand how frustrating it can be when someone is misinformed about Bitcoin and cryptocurrencies in general. Unfortunately, there are still plenty of misconceptions and misunderstandings swirling around the industry. It can be tough to break through those preconceived notions, but it sounds like you made some real headway with your friend!

The argument that Bitcoin is bad for the environment is a common one, but it is largely a misunderstanding. While it is true that Bitcoin mining currently requires a significant amount of energy, it is also true that Bitcoin mining operations are increasingly looking towards renewable energy sources, including hydroelectric power and solar energy.

As for the argument that Bitcoin has no value, that is simply not true. The value of Bitcoin is driven by a combination of its scarcity, utility, and demand. Bitcoin is finite, with a limited supply of 21 million bitcoins, which gives it a certain scarcity value. It is also increasingly being recognized as a useful and practical currency for everyday transactions, which further drives up demand.

The Lightning Network is a powerful innovation that is helping to make Bitcoin even more accessible and useful for a wider range of people. It enables near-instant transactions with negligible fees, making it ideal for microtransactions and day-to-day payments.

It sounds like you did a great job in explaining all of this to your friend. Hopefully, he will come around and see the true value and potential of Bitcoin in the near future. In the meantime, enjoy your workout!