If you’re going to do that then you’re supposed to look out fee the one that has the potential to keep on growing till then. I don’t know if I can really hold Bitcoin for ten years now, seems like a big risk to me (well, all of them are risky). But Ripple (XRP) might be a very good choice to go for if you have plans to hold for that long. Bitcoin is good too, but for me I can’t hold it that long.