If there is no other currency then bitcoin could have gotten to an unimaginable price and could caused a price surg making it too difficult for an average person to acquire some of it then again the minimal transfer ratio could have caused panic across investor coupled with the sudden gas increased I think people would hardly make transfer.
You are right, and exactly in line with my previous comment, I can only imagine what or how congested or clogged the bitcoin network is currently is, all because of the so called ordinals on the network.
Now, I also want to imagine how clogged still, the bitcoin network would be by now if bitcoin was the only crypto currency, and then, let's also assume that ordinals still found their way into the bitcoin blockchain still, it simply means that transacting in bitcoin would have been completely useless, as even with a $500 to $1000 transaction fee to maybe send like $100

, the transaction will still be there for weeks before confirmation.
I've said it before, and I will still and continue to say that altcoins are a blessing to bitcoin, for the work of cryptocurrencies would have been too enormous for bitcoin to handle, but with altcoins available as an alternative, we all have a smooth running cryptocurrency ecosystem.