do you think the SEC will approved etf in august
Bitcoin futures have been traded successfully for about 7 months now, so I would say there's a good chance it will. Custodial services are also being offered by big companies for institutional investors, so that's a plus.
and what is the expected price of bitcoin if etf get approved
As much as the idea of regulated ETF for bitcoin still sounds crazy to me, it might actually have a decent effect on the price. ETFs does target high net worth investors, so having them participate(directly or indirectly) in the market would convince others it's safe and would still help adoption.