I doubt that it will be a "crash." As you add, it will not be permanent, therefore if and when it happens, it will most likely only be a "major correction." Bitcoin has had them before, and it will have them again. That's to be expected.

If there was ever an investment (besides precious metals) that was a buy-and-hold deal, cryptocurrencies and bitcoin in particular are it.

As for its being called a bubble, I recently read where an astute observer stated ...
"Bitcoin is not a bubble. It's the pin." :-)