I believe that with enough crypto adoption from many countries these days, convincing our parents to invest in crypto shouldn't be a problem. The problem is that, we try to make them understand almost every single aspect like Blockchain, DeFi, Staking, Farming, Launchpool, Metaverse (now), etc., but the real fact is that, they are interested only in making money. So why not show them some results after investing very small amounts by yourself and tell them that if they'd have invested in the same tokens you did, wouldn't they make the same or even better profits based on their investment amounts?
I think that it is much easier to convince parents when they have a high financial education culture, and for those who do not, it is better before speaking to recommend or give them a book that educates them, on how the financial markets move, the effect whales have, or how a certain speculator or investor faces the market according to their criteria based on a difficult scenario, or if you have enough patience to explain that to them and then explain how the BTC economy moves, which has an ingredient difficult to handle as is volatility. And maybe the voltility is what makes many not like it, it is normal.