I remember reading an article written by a guy working for Yahoo, when their share price was nearly at it's peak. The article was written later, from his experience at the time. He sat down and did a value analysis of the company one day, and came up with the value of about $42 a share. Some ridiculously low number. Needless to say, he sold his shares before the crash. lol
It's said a main cause was new investors. A company would sign up with yahoo, dump $30,000 into advertising over a few months, and then quit because it wasn't bringing any actual returns. The issue is there were new companies doing the same thing every month, pumping Yahoo's published profits through the roof.
Once it became clear it took more than simply advertising on Yahoo for .com results, the share price tanked with the drop in new investors.
The media has been spreading disinformation about cryptocurrencies for quite a few years now, and the regular Joe Public is rather ignorant. You're going to see hundreds of thousands of fiat currencies pumped in, by millions of ignorant people. Yep, HUGE bubble coming. Massive!
Look for coins which are difficult to use now, that have an awesome potential in their upgrade path. Pays to be a geek, able to use esoteric software before it's refined for the pointy-clicky ignorant PC user of today.
Buy a roll of duct tape, some of you may have difficulty staying grounded, while your choices take off in value. lol Strap yourself to something really solid.