It's definitely scary to do that right now, I had the option to pick up some more ETH early today when BTC was still above $1200 but decided for a more stable investment (basically turned it to fiat). It's called taking profits from Bitcoin too, this was another peak and I doubt we'll see it again in the next months.
I hope Bitcoin get it together eventually (honestly I don't know how for the reasons I mentioned many times in this thread). You used the word complacency and that's exactly what happened in Bitcoin lately. Today I've read that Google was the 21 search engine in history. The self fulfilling prophecy that Bitcoin is Myspace can become a reality if this trend continues.
It's not so scary for me. I bought previously around 0.02. This is a top-up so that I feel I've a reasonable insurance against ETH overtaking Bitcoin. I have tons of reserves for a dump, but it's difficult to know when it will come - these exponential trends can really run away. Now we've sailed past the ATH, I think even 0.1 could be on the table.