Interest in anything is extremely hazardous and you may lose a huge part or even the majority of your speculation over a brief timeframe. That is the reason they state: "Just invest a measure of cash you can afford to lose."

I am aware of certain individuals who purchased bitcoins for $20,000 each crypto back in December and January 2017 possibly to poo in their jeans and panic sell when bubble burst and the cost of bitcoin went down to under $6,000 each.