If and when cryptocurrency and/or bitcoin becomes the official currency of the world, do you think there will be a downside to it? If so, what do you think the negative effect will be once cryptocurrency becomes a worldwide currency?
Probably the downside of cryptocurrencies is that it is unregulated. Once the developers release these in the wild market, it's free for all to mark the price of it. Just like bitcoins, it was just mere cents before and now it scaled to tens of thounds of dollars.