I am very happy that your sharing is useful.
But if you explain to a person who always treats Bitcoin as a scam that Bitcoin is not a scam, you will find that no matter how you explain it, they will follow their ideas. Your explanation is useless. I once talked with a friend for half an hour, and he remained indifferent, just believing that Bitcoin is a scam. I can't do anything about it. He doesn't believe me to let him watch me operate the transaction.
If your friend has research on investment, you can let him try cryptocurrency, let him operate and feel himself. If your friend is not interested in investing, he will not believe it no matter how much you explain. We don’t have to make everyone like Bitcoin.