If it will be listed on that date and wall street guys will start to buy bitcoins than price can easily double or even tripple within next few months.
Now lets talk about altcoins, Alts price is going down in terms of bitcoin not in terms of fiat and it might remain same till bitcoin will surge. When there will be huge correction price of alts with high marketcap like ETH, XMR, LTC can fly again.
If you are altcoin holder than its best to keep your altcoins till this surge will be over and hype on bitcoin will be over.
you are telling folks to hold alt coins , when btc crashes, there is no reason to hold on to anything, its all over cheif