1) Easy to make, easy to lose.
2) Whatever you are thinking of doing, so is everyone else. If you're planning on outsmarting thousands of other people, just remember, they are planning to outsmart you.
3) Any market with a high volume of flippers (buys to resell and make money) vs users (actually use a product or service) might be a bubble. High rise bubble, mortgage bubble, housing bubble, Miami condo bubble
4) The worst time to make decisions is when you feel like you're going to lose out on something spectacular. When you have visions of grandeur. When the emotional side of you is most active, the logical side of you is being repressed. Watch out for that.
5) "This time is different!" is bullshit (when relating to bubbles and re-occuring events). Each new generation brings the same humanistic flaws of the last generation. Doomed to repeat itself forever and ever. Humans will be humans the same way sharks will be sharks. We are cursed with a primitive instinct that might have worked thousands of years ago in a tribal society but now is working against us.
6) Whenever you take a gamble, ALWAYS assume you are going to lose. If you're ok with the outcome of losing and find the gamble to be worth it go ahead and take a risk.
I didn't lose too much money in bitcoin but lets just say it was money that I was saving up for braces. That was the deal I made with myself. I'm still angry that I lost, there's no point in lying, emotions will be emotions. But the way I see it, I didn't lose the money in bitcoin, I invested it in some really good "real world economics" classes at a good collage somewhere...