Yeah, I agree with you, 4500$ seems feasible by August 23rd. However, I do not think it will stay that strong long, because all of this caused by a SegWit hype I guess. We should come back to around 3500$ I think after the fever has gone.
I don't think that price comeback to $3500.
Even though if Bitcoin come back at $3500 it'll eventually surpass the current ATH like what it has always done before. Every time I'm selling my Bitcoin, I just feel damn regret because if I hold it longer, I'll have more amount of money. Well, that's always happened in this crypto currency world.