So your reasoning is the following.
You are long 10 BTC. You short sell 1.
1)If BTC goes up, you are happy, because you lost on the short bitcoin, but actually you gained.
2) If BTC goes down, you are sad, but at least you can buy back your bitcoin, profit from it and alleviate your suffering.
THe reality is.
a)You are long 10 BTC.
b)You decide to sell 1 bitcoin.
c)You are long 9 bitcoin and some cash.
If BTC goes up, you are happy, because you gained. on those 9 bitcoin. Cash is the same.
If BTC goes down, you are sad, because you are losing on those 9 bitcoin. Then you decide to buy another bitcoin and you are long 10 bitcoin and some (less) cash. You are in a very similar position than point c. but with less cash to spend on more bitcoin buying.
Try to look at it another way:
You are long 10 BTC. You short sell 1.
BTC goes down. You close the short and 10% of your virtual losses on the long are recovered.
Then, EITHER
- BTC goes back up. When it gets back where you started, you still have the (real) profit made on the short.
OR
- BTC goes down some more. You're losing, but you're losing somewhat less. You have more margin - whether you want to risk some more, or you're just glad your liquidation is that little bit further away.
That's how I have used my contrarian positions until today, and I am glad I did.