Just as important as investing in bitcoin one should have a fair understanding of bitcoin and be careful. All parents like to make sound decisions about what to do when the market goes bad, investments fail business goes bad. That's why you have to know about the risks first and make sure and then take the right decision. Don't give money unless parents and cousins are sure to give money.
My parents know about me from long time but they never hold me accountable for my work. My father is an expatriate and from his monthly remittance I invest a fixed portion in Bitcoin every month. Even though my mother knows this but she never asks me anything about it as my mother is not educated enough. But my parents support me in my work. That's why I don't do any work without the support of my parents. But I have invested in Bitcoin with my parents' consent, in this case my parents will not blame me in this matter even if there is loss instead of profit in future.