Crypto currencies is are "cute experiments" so far. Bitcoin being the flagship has probably grown larger then it was designed for and should technically be replaced by a 2.0 but its not like you can "switch" now. The others also suffer from the same experimental phase and most if not all will die out rapidly. There might be one or two competitors to bitcoin but none will survive in the long run. I believe there will be more generations of Crypto currencies or even other forms of digital currencies that will replace them.
Perhaps something based on Quantum tech?
go along with that - there will be changes of currencies - alot of changes - but that´s also part of game 7 business - as i´m from Europe; i´ve faced also quite a couple of fiat currency changes :-) this happens, it´s normal sometimes you lose - sometimes it fuckes up bankaccount / plans / dreams ...
but what is important to the (alt) coins is that it´s (partly) new concept of how money could work... and how it´s set in sociaty...
to get familiar and fit with how the stuff works here - when handling this kind of money - that´s important.
... as important as to have always enough of what coin / kind of money when you need it :-)
on the alt / bit coins ... it´s always clever to split it - to make diverse portfolio...
get some of your money to mining equipment, save some of every coin just in case - trade some here trade some there - keep some of the coins that look promising for your kids - sell the rest before it´s to late... put some fiat into the crypto coins casino - take out some wins if you do clever... but always keep in mind although money is said to make the world go round, it´s just something you have to use and never ends in itself....
back to the altcoins - and which will make it...
- who the f**** cares -
what is most important that the idea of having a global working, alternative to the old school kind of money (authorized by nations / state / government) is going to last and get´s enough power to make it for the futute...
the rest is selling and buying... and waiting :-)