Probably not, but...
If you remember the dot com bust, there were a few precipitating events that got everyone looking closer at sky-high valuations. Enron is probably the most important of those. While Enron wasn't a dot com, they used some very creative accounting practices to book revenue and inflate their value (innovative, disruptive, new economy, and all that). Their crash helped highlight the funny math going on at internet companies and helped get investors and regulators asking the hard questions.
The current bubble has a few possible candidates for an Enron-style scandal. I've thought that Theranos might be it - they fit the broader narrative of youthful founders disrupting stodgy industries and minting new billionaires. Then there's Uber, but they have enough investor money in the bank to hide any structural issues with their business model for years. Palantir is another that may help burst the bubble as they learn that the outrageous consulting rates and blind faith in their methods they received from the military are difficult to replicate in the business world when you have some level of accountability to shareholders and customers. They have less cash than Uber to mask their situation much longer.
But, maybe it will be just like before: good old math that no longer adds up. At some point, all the SaaS companies using the clouds will run out of credits and goodwill from the providers and be asked to pay real rates for the services (just in case you don't know: almost no SaaS company actually pays for their hosting on the major cloud providers for the first year or so, and even then they pay deeply discounted rates. And if you're at a SaaS paying full rates to Amazon or similar, you need to call your rep - your competition is paying less than you. The cloud providers do this in hopes that strong businesses will emerge that they can eventually reap profits from - Salesforce is the classic example). I'm guessing* that all the major cloud providers are using some form of funny math to hide this.
So, Oracle's probably not going to suffer the fate of Enron. But, just like in the last bubble, "clever" accounting may be what finally pops it.
*ok, I know from direct experience how at least two of them are doing it, and yes, they're doing it