This is not advice but here is my uneducated opinion. It seems like btc segwit adoption might be the catalyst that hits the alts . Sounds like that is September. If is like other markets I expect breadth to deteriorate with only the top currencies doing well just before the fall and bitcoin the last man standing. Many of these alt traders will go back into bitcoin causing a blow off top that takes years to regain. Now is that at 2500 5000 10000 it's hard to guess. But if market stays the same and bitcoin dominance goes to 67 percent that's $3450 and if the market grow say 20 per net more that's $4150. So that's seems like a decent range. If is a real giant bubble maybe we get 50 percent more in which gets us around $5,000.