Hello, recently one of the most famous traders Tone Vays said that next bull run will cause altcoins crash because people will start with the massive sale of altcoins and they will put everything in Bitcoin.
Do you agree with him? Really only Bitcoin survives?
I think that some altcoins can actually die, but it will depend on how the project will develop. I think that in 2019 all the coins will take on value. During this proper bull run (probably in 2020) some altcoins can unfortunately lose.