Do you think Bitcoin is money?
Then the right price is simple: The amount of goods you can buy for 1 hour of labour should be equal between USD and BTC. If you can buy an apple pie for $5USD, then you should be able to buy a pie with $5USD in BTC. The problem is no one is actually selling anything in BTC in the real world.
If you think Bitcoin is money, you shouldn't be "making money" off it anymore than buying another currency in USD. The fact that it is increasing exponentially in price is a bug, not a feature.