None of lets say top 20 mcap coins will 'vanish' in 2k19 for being too established and popular, one would say they might already won as being adopted early.

Not even all these sketchy BTC forks, loosing ETC or most hated ones (XRP, TRX).

Opinion that LSK or DASH suddenly disappears is naive and I would quite like to hear an arguments to happen just so. If coins like that dies, it means we are all fucked, because that would mean the whole market went down. Such a coins may go down only if turns to be scammy and/or attacked/hacked an enormous way which the thread is not about.

If just one top 20 mcap coin 'dies' soon it would be a big suprise to me, just imagine some top 20 stock company to die all of the sudden. No, dying mostly happens at waters of low capped shitcoins, under the radar of normies.

P.S. the shittiest high-capped coin IIRC fucked up already, it was called Bitconnect.