Why not? you can invest in bitcoin for your kids future, but you should know your limits. It is important to know when and at what point you should stop. Invest in a certain amount, meaning that you shouldnt go "all in". The world of cryptocurrency is a pretty unstable and high risk investment as it continues to increase and decrease in price. If you invest all of your money on it there's no guarantee that you'll receive a lot of gains. Well this depends on your patience. I have observed that bitcoin takes a lot of time before it spikes up in price. Another advice is to not solely depend on bitcoin as your means to earn money. Just treat it as a sideline while youre working to earn money.