GProgrammer on 21 October 2017
There is no limit because inflation exists, so even if a company stays the same in real terms the numbers will increase i.e. $100 in 2017 is only worth $98 in 2016.
Also the dow jones will always go up over time because of how it is 'rigged', eg if a company performs really bad its dropped from the dow jones and a new bigger company takes its place
