more Bitcoins. They sold at a high price, bought cheap ETH, sold them when they saw a collaps coming and
now the re-buy Bitcoins at a lower price
Problem with that non-theory is that people invest into ETH via BTC. People then cash out of ETH, via BTC. If anything, people gonna want to take cash profits from ETH, which means that they cash out through BTC.
or, they can choose to hold btc because it is rising. people don't always dump to fiat.
Yes.....but you miss the point. People coming out of ETH and into BTC, aint gonna make BTC rise against the USD. Folks putting BTC into ETH, already exchanged thier USD for BTC.