It's a trend that will not reverse
Oracle's reputation for an aggressive licencing regime with subtle "gotchas" has ensured that new businesses are not putting Oracle into their database plans.
There are lots of database alternatives around, some free, and there is no longer the imperative to go for Oracle. Back in the day it was said that "no one got fired for buying IBM"; with Oracle being a solid database from a large (ie not likely to go bust) company then this was the database of choice - then.
Despite Oracle's denials about it's sales practices the rumour mill is fairly solid. So, new businesses look to other database sources. This means that Oracle's existing customer base is going to slowly shrink. The Cloud has better alternatives which is why Oracle tries to coerce their existing customers to use it.
Every empire has it's day and I can only see this one entering a period of slow decline. It's no wonder they were desperate to get the US JEDI contract.