How can anyone prove you wrong?  Only the market can do that with time. 

Also, this:
is demonstrably false.  I've purchased quite a few things with bitcoin, and only a couple of the vendors I've used bitcoin with accept ETH as well.  It's kind of rare to see a merchant accepting anything other than bitcoin if they take crypto at all.

As far as the $20k mark goes, yeah the market was in straight up bubble mode for a while and I figured it wouldn't last.  But damn, it was an exciting time to be holding bitcoin!  Unfortunately I don't think I owned much at the time, and I certainly wasn't actively trading or buying any.  When you get threads with people talking about selling their houses and buying bitcoin with their credit cards, on margin, and all that other happy horseshit, you know the market isn't rational and will correct itself soon.  I was expecting more of a rebound after the crash, but being in the $3000 range isn't bad at all IMO.  I recall when I first got into it, bitcoin was 10x lower than that.