All time highs are kind of a sign of a bubble, and say nothing about the liquidity of any investments or the time value of the return you can expect from them.
FYI it's fairly easy and cheap to short BTC now if you really believe this.
Where? The first hit on a Google search is a Quartz article from three years ago.
Bitfinex
That's an uninsured, international exchange. At the rate exchanges are "hacked", why would I ever trust them enough to put my money into it?
IG Index has bitcoin as an instrument. The spreads are terrible though so I wouldn't recommend it. If it was easier to short DAO tokens I'd think about it.
Damn. Should have more than just thought about it.
By all means don't invest then. It's pretty presumptuous to think people who see things differently need to be "educated" though (as the OP is attempting to do).
I think it's a natural pushback to the over-the-top evangelicalism of the crypto-cultists.