I cashed in 2 days ago too.

Most of my investments where held for 6 months+.

Signs the bubbles was about to pop:

Jump from $500 billion to $620 billion market cap in a matter of days.

Coins with little technical merit, no product and no utility reaching eye watering market caps.

Charlie Lee selling his LTC.

ICX not taking off as expected / hoped.

Bitcoin making national / international news on a daily basis.

I'm sure there's other stuff too. But it just didn't feel right.