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.
Their generation is different from ours and perhaps their point of view on bitcoin and gold is quite different from their partners, so it is impossible to explain bitcoin to them with just words. People of their generation are more likely to look at investments based on visible assets such as gold, land and housing because in their view something that is not visible carries a much greater level of risk. In their generation, virtual currencies like bitcoin did not exist and it was difficult to explain how the bitcoin process affected investment and perhaps technological issues also limited them from believing in it.
Apart from providing relevant evidence, they also have their own views regarding investing in Bitcoin and I don't think you need to convince them. As long as they can guarantee the traditional investments they make then you can try your luck in investing in bitcoin independently and turn to them when you are successful in investing in bitcoin.
Right now I want your important advice on how to convince them.
You can't convince them by just saying that bitcoin is the best choice right now and all you have to do is try to show how the investment you make can produce maximum profits exceeding the value of gold.