Here’s an interesting list about the top ten bubbles that are current in the making. I think the main thing to keep in mind is that a bubble only exists when a large amount of people “bandwagon” on something popular, with the belief that it can only keep going up. If you can recognize that, you should be able to avoid them.
Here’s the list, but read the article for a better understanding of why they deem it as a bubble (might not be what you think).
1. China bubble
2. Green bubble
3. Gold bubble
4. Federal Reserve bubble
5. Trash stock bubble
6. Education bubble
7. Subprime bubble, 2.0
8. Life insurance securitization bubble
9. Commercial real estate bubble
10. Emerging market bubble