Wow that is a brave response. If you look at existing data it might be possible to say that Bitcoin and Etherum will never end. I said that because the two coins had such high marketshare. So I think that what you say will never happen. Bitcoin and Etherum have very good quality levels and they will last a very long time. Both are very favorite coins and have a very good market share at the moment. Believe that what you say is a mistake.