Pretty smart to leave bitcoins for your children because that will make them rich and they don't have to worry about taxes or anything. But maybe it will be for nothing because bitcoin may always go down and maybe another coin will become important.
Bitcoin has a big future ahead and other cryptocurrencies i think has a long way to go if they want to overcome bitcoin. Yes, it is possible but i don't think it won't happen in the near future. Much better if we earn our bitcoin and save it for the future of our family.
If we look at the graph of the performance of bitcoin since the time it was introduced to this world, then well get to know this thing that bitcoin is gaining more and more reputation with each passing day. I dont really think so that bitcoin will lose its value in the future. This idea of keeping bitcoins for the safe future of your children is really a great idea and this will help them in meeting all their needs.