For example, if you invest $100 in a cryptocurrency, then you risk only this money in case of an unsuccessful investment, but in case of a successful investment you can multiply them by 10-20 times. As an example, you can cite DASH, which in February 2014 was worth $0.2 and now went up to $320. That is, every dollar invested in the DASH in 2014 would bring you $ 1600 today, and if you take into account the fact that the price of DASH in December 2017 was up to $1500 per coin, your dollar invested in 2014 would bring you $7,500. This is just one of hundreds of other examples, but it's up to you to decide whether to invest.