The most important feature of a cryptocurrency is that it is not controlled by any central authority? People have made and lost money speculating on it.
source https://www.google.com/url?rct=j&sa=t&url=https://www.bogleheads.org/forum/viewtopic.php%3Ft%3D277453&ct=ga&cd=CAIyGmM2Nzk3ODA2ZWViNjVjODI6Y29tOmVuOlVT&usg=AFQjCNFK4WtjfRSstDE9_vbzkwBtKj6JeQ
