Its not bad if you want to put some investment in bitcoin for your children but I would suggest not to put everything on it though the value of bitcoin really rising so fast still we are not sure of its value in the future what you can do is make some sort of test in the market you can buy some and hold for while then sell them with a good mark up when value appreciate then invest again, don't hold for too long
This is not a bad idea. I thought about it, but it is quite risky. We can not predict what will be in a few years. The bitcoins will survive, but if your plan succeeds, your children will have a lot of good.