...
Also, ETFs could be a double edged sword for BTC/ETH, there's no guarantee it will cause a price spike.
I think an ETF approval would play out like the launch of the Bitcoin Futures.
A huge price rise in advance of the news of the approval and in advance of the launch
date. Afterwards a huge dump as people take profits. Bitcoin only really
goes on a crazy bull run if there is a catalyst for such a run (MtGox manipulating the market,
BTC Futures, block reward halvings...).
The current sideways price action is at least partly caused by the lack
of a catalyst for a bull run. Besides, the downside risk is also limited, because the price
is not much higher than the average cost of mining a single Bitcoin.