Glad i have at least 12 Ethers in my trezor wallet. I ain't going to sell them no matter what. It is logical that ethereum will go above 1000$ in the short term. when i want to transfer bitcoin i convert to ETH then back to bitcoin, is cheaper sending money this way 
and faster.
and faster.What makes you so certain about that? If your definition of short term is withing the next 3-4 months, I agree, but if you mean this year still, I really cant see that. ETH going to $1000 would need a big rise in market cap and as ETH's market cap is already high and moving very slow as we have seen in the last 6 months... would be hard to climb to $1000 this year I guess.
I agree, having ETH in cold storage is great, I have mine in my Ledger!