First of all please don't get me wrong, probably everybody here is making money and have or will haver a better lifestyle thanks to cryptocurrency.
But every tech in the history of mankind have a down side, for exemple in the begining of XX century the seach for rubber lead to a war between brazil and bolivia "Acre War". However, every bad thing have a good side, a tech grow stupidly fast thanks to the nazis.
So for you what will be the down side of cryptocurrency ?