I think it will be massive for the alt's but it will be selective and not all alt's will rally. If btc has a $1trillion market cap money will just start to rush into the alts on the fear of missing out. So, if BTC has a market cap of $1 trillion and bch only has a maket cap of $4 billion, just a few billion of money from btc to bch will cause a significant move upward.... just my 2 cents. It's going to happen to the alts.... a matter of when not if