This number will likely go down to below 1% because:

- S. Korea have implemented large scale tests on asymptomatic cases and their death rate is 0.77%

- the "Princess Diamond" cruise, which can be considered a closed experiment, has had a 1% death rate for people that were not ventilated

- in China if you exclude the Hubei province, the mortality rate is 0.88%

In Italy the mortality rate is 6% but the explanation is quite simple — they stopped testing asymptomatic cases, even people with fever are sent home without a test and instructed to return in case the fever doesn't go away in a few days and they are overwhelmed. At this point they are only admitting people that have trouble breathing.

And northern Italy has really good hospitals, so the only reasonable explanation for the huge disparity is that they have more than 10 times the reported total cases.

In other words, the virus has infected many more people than official numbers.

Remember that those "total cases" are cases that have been discovered via tests, it does not include people that stayed at home and weren't tested, either because the symptoms were too mild or because they were sent home.