2019 will have many of big coin as Telegram, Facebook... What will happen to the remaining altcoin?
2019 won't be hype just like before for altcoins.
I've heard a rumor about facebook that there's an insider and said that they are going to create their new coin. But that's a rumor which doesn't have an official announcement if they really are creating it. The remaining altcoin will be there and will work just like the normal way.