Am I crazy for having a finger on the sell button?

Most ideas I'm seeing are long. It just seems odd to me to be so bullish right at previous highs. We all know the stock market is over done, and if the last crash is anything to go off of, a sharp decline in the indexes may be accompanied by a similar decline in btc. I'm tempted to take some profits here, and possibly continue accumulation once we are back in the 9-10k area. But then I read the deluge of long ideas and have to wonder if I'm just being hopelessly contrarian.