You are "right everything" , the movements it is natural the waves the changes even the low prices that we see and experience as of today is normal and must be treated with good patient and one must truly understand the ways of a investors and a holder of an altcoin.

What will happen? To the remaining altcoin? It can go down and remain down but it can go on shitcoin as well if we do not believe on it.

Holding can be the best option amif you still see the opportunity on every altcoin and bitcoin but if bot you may wish to do an exchange on altcoins.