Another parabolic increase after a few months of accumulation and blow-off? Improbable, no matter how good the ETF is, but possible to make the similar climbs back to $15-$20k. With the current market conditions, it isn's possible for the price to climb such heights without some solid preparations from the market movers. Aside from that, where would the rest of the money come from and who would buy at such lucrative prices? Regulatory ETFs are big market events, though without any complementing factors it will not be enough to carry the market at such heights.