People hold there bitcoin for get a big profit from them.Now a days bitcoin price incrieas up.So those people who hold there bitcoin.they can make a bigg profit from them.
By the holding of the bitcoin people make money for their self, they buy bitcoin when the rates are low and hold it for a time so that the the value of the bitcoin in the market riased to a point that they assumed. After that they use bitcoin and make more Dollars that invest in the buying of the bitcoin. In this way of the HOLDING people are earning money with bitcoin.