Holding on to bitcoin for your children to get once you pass away would be stupid in my opinion. The odds of the bitcoin being worthless by the time you die is massive compared to it being worth alot of money. Gold would be a better way to pass money on to later generations.
Why do you think the odds of bitcoin being worthless is massive? I can't think of any reason other than the fact that every government in the world started to go against bitcoin or huge flaw has been detected where the security of the technology is in question. Even if a better coin is created which solves all existing problem, I am sure people will still use bitcoin as a store of value. I guess the problem is passing the bitcoin there are chances where the private key might get destroyed or lost. Though I won't deny Gold would be better since there are zero something going wrong with gold.