A decade ago it was under $1000 and has never been that low since. It's peak price is only about 2x the current price.
And being higher over 10 years has little to do with it if acts counter cyclical to stocks and other assets.
BTC has been called many things at many different times. It was originally a payment system:
> A purely peer-to-peer version of electronic cash would allow online payments to be sent directly from one party to another without going through a financial institution.
* https://bitcoin.org/bitcoin.pdf
And it can still be used for that, however the transaction throughput is tiny, and so it became a store of value in essence: but it's kind of hard to be that when the value swings up and won so much. While "fiat" currency inflation is annoying, it is, generally, fairly predictable in most cases (<4%) and so you can plan ahead with regards to future value and purchase. The same is hardly true of BTC.
Even companies have some value after a crash and you could make a case that at some arbitrary point it was worth $x and since the crash didn't cause the company to crater to below $x it has not "crashed". Even companies filing for bankruptcy have some residual value above what they might have been founded on - it doesn't mean the company hasn't gone bankrupt.
To be more specific, I have often seen people argue for including crypto in a portfolio based on the theory that if equities drop a lot (25, 30%?) crypto will hold or go up. People make the same argument for gold.