For example, if bitcoin is going to crash and I exchanged it into $1200 Ethereum lets say. And it goes down to $800 USD, will the Ethereum value go down?
Could you exchange your bitcoin into another currency to be protected from a crash?
I think Coins like Doge, LTC , USDCOIN all of these are 99.9% stable always in the same price, 0.01% prob that you are very very very unlucky and it drop when you buy but I don't think it will happen.
What do you think ?
Actually this is one way of preserving the current USD value of your holdings. As far as I know ETH and other altcoins are independent from Bitcoin price, so whenever Bitcoin price goes stronger, if the altcoins cannot go up with the BTC increase, then they will be less in BTC. Sometimes they are inversely proportional.
About the drop in price, there is always a possibility that there is a drop in price in altcoin during the conversion. We cannot avoid that. But sometimes we can profit from the conversion if we manage to convert before the market price go against our holdings.