There are many people that use their central online wallet as a cryptocurrency exchange and this can be a very good idea because it gives you the chance to be able to buy and sell other coins using your existing coins and to secure their value in a stable coin to avoid losses during price drops. However, the withdrawal fees that are associated with some of the major coins are very high! In fact if we just look at the yobit exchange, there is a withdrawal fee of 100 DOGE to take our your funds. This is around 40 dollars.