The idea that causes me to hesitate is that many opportunities online are easy to replicate. You have to think farther into the future to determine if there are any actions by competition that could devastate the customer base. And you have to think more broadly on who is a competitor. People are definitely having success online. But how many success stories are organic growth from scratch vs acquired? Something to research more.

I think "online business" is very broad. I had a SaaS company that was totally virtual and had a successful exit. I also know of several people that run successful Amazon fulfillment businesses. So while I generally agree with ^redacted‌ comment about low barrier to entry being a problem, some of these businesses will be resilient. It's also helpful to think about the positives relative to a physical business - highly scalable, easier to access customers, no capital expenditures, etc.