I will show you the very easy and simple way to power down your Steem Power into Steem and then to transfer to an exchange wallet or coinbase wallet in order use elsewhere.
Its not recommended to power down your Steem Power or to cash out your Steem. When large 'whale' accounts do this, it can affect the Steem price. People can look down on your account if they see you powering down and not provide 'support' with upvotes or general engagement like following you or making comments on your decentralized content.
When you 'power down' your Steem Power aka turning it into Steem, you are given a 13 week withdrawal option. You can choose how much Steem Power you are going to power down once you select the power down option.
After a week has passed or the full 13 week withdrawl of your Steem Power into Steem has happened, you are now able to sell to an outside exchange or coinbase with a simple option in your 'Steem' wallet and your 'Steem Backed Dollars' wallet to do so called 'Sell' in the pull down menu on Steemit.com on your wallets page.
When you select the 'Sell' option on your wallet(s) you will be re-directed to the 
