Privacy for digital transactions is so important. The intention of crypto currencies is financial freedom. Independence from banks and middlemen.
For instrance, say:

Danger from criminals

Suppose you have a considerable amount on your Bitcoin address. Let’s say you own 100 BTC. Today it was about $1,025,000. Would you want other people or a different group of people to know that you have $1,025,000? What if criminal instances smelled the roast and will try anything to make you loose $1,025,000 easier? This theory is not so far-fetched. That’s why privacy is important. Nobody needs to know that you have 100 BTC on your address.

So if you have $1,025,000 in crypto currencies, the risk of losing everything is there anyway. But you can reduce the risk by having a privacy.