When you leave your property and investment to your children and they ended up lavishing them, that should not be a problem because you can not come back to life and take it away from them. They have the full right to do anything they intended to do with the property and that should not bother you. Your obligation is to work hard and make the money so that your offsprings are not going to be begging for food. If you don't work hard for your family to be proud of you and your remain poor, one day they would insult you than why didn't your work hard and make money when you mate where hustling, investing their funds to become more richer. Bitcoin is a good investment and we should hesitate to reach children on how to make proper investment as a Bitcoin enthusiast.
You speak the sad truth. When one is dead he is gone, there is nothing he can do to help his children. At least the training he gave them while he was alive should be enough for them to be wise. Despite the right they have to do whatever they want with his property, it is an obligation that they should take good care of what you left for them. Since they feel it is an obligation for there parent to leave something unique for them to inherit, they should also know what to do when that time, so that eventually the parents effort wont be in vain.