Agreed. Good idea to get out of BTC at these levels. 99% of crypto is bloody red today, again. Anyone who's got BTC and isn't buying STEEM is bloody nuts. The same can be said for BTC, SYS, ADA, to name my favorites, and the list goes on.
And, if you don't mind taking a tax hit, fiat is ideal right now, in my opinion, of course.
Like you say, Coinbase is #1 and they now take Litecoin. Once you've made the transfer and conversion, you can relax while your banking info confirms.
If you're in Europe, LiteBit is Coinbase's competition, and they do a good job too, along with giving the customer a little more flexibility.
Both have buy and sell spreads to be aware of.
RE: Want to take your BTC profits and sell them? This simple trick will save you time and money!