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.
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.
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).