Bitcoin may have some problems right now, but to say that it could be replaced by some other altcoin is out of the question, at least right now. Bitcoin being the first has done a pretty good job with public acceptance thus far.  No other coin has come close to even half of that kind of publicity as Bitcoin. Therefore if bitcoin dies altcoin as we know it may just go with it. Take bitconnect coin as a case study, immediately it went under so did the rest lending platforms.