I did not see in this article suggestion of the oldest business type. Just buying and selling goods, you can do it simply by researching what is selling in Ebay or Amazon from your location. Or just think of products which are unique for your location and then research prices in ebay, amazon.
Online sales Amazon offers one that most always look for, another option is through Wallmart, but to sell is very difficult since you need to have well-established social networks where you have a voice and vote where followers are comprehensive and not bots , this is very difficult.
In Colombia they are studying the way that workers can work from home and send their reports through the network, if this is so, many jobs will be compromised, it is easier to pay a programmer who designs an artificial intelligence bot to do all these tasks anyone can do.
Obviously online jobs will be the ones that will rule, now the pandemic has set a pattern, there are job options on a page called microworkers.com where you have to make publications and they pay you in Paypal, some tasks are restricted for certain countries, but it is very normal now.