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.
Maybe your parents have no experience with cryptocurrencies so they want to hold their money in physical assets instead of bitcoins. The older generation is not as educated as compared to our new generation which is why they don't believe in virtual currencies they think they are all scams. You can convince your parents that if you spend the same amount of money in physical assets, you will get more profit in bitcoins than in physical assets. Maybe they'll be tempted and tell you to invest in bitcoins.
Why does it take time to convince your parents to invest in bitcoin? Why don't we make our own money and invest in bitcoin and prove to them that investing in bitcoin will bring huge profits?
I agree with parents when they do not agree to invest in bitcoin: Firstly, they are not familiar with it and they also have the right to choose, we should respect them. Second, if you don't have the ability to make money and still rely on their allowance, there's no reason for them to believe what someone who doesn't have the ability to make money teaches them about how to get rich.
Personally, I am investing with my own money and I will give part of my profits to my parents. I want them to understand that my choice is not wrong.