My parents thought that bitcoins that cannot be seen or touched cannot be an asset. They think that investing in physical assets such as gold, bank deposits, land etc. is more profitable than Bitcoin. But even after I convinced them, they are not ready to invest in Bitcoin. They don't want to believe in virtual currency.
Right now I want your important advice on how to convince them.
It's up to you how you can encourage your parents to comment on which investment is good, but here I will discuss that you need to place more emphasis on your parents to understand the difference in technology that people now adopt for something new and more desirable. For example, you should understand that people used to travel abroad in buses and trains in early days, so when aeroplanes were invented, people hesitated to travel in them and embraced air travel for its benefits, knowing that there was a risk of harm, but soon they realized that their benefits were more than their impairment.
So, in the same way, you should understand from the example of Bitcoin that it is true that there may be some loss due to the volatile nature of Bitcoin, but the benefit of adoption of Bitcoin is greater than the impairment. And moreover, it's up to your investment strategy as to how you can manage to survive in volatile assets (Bitcoin).
So it means that you should explain to your parents, like in this example, that investment in Bitcoin is a little more volatile than gold or real estate, but the profit ratio is higher than that of gold and real estate.