Does Steem hold its value as Steem Power?

I apologize for creating a new post for this, but I haven't been able to get a straight answer, maybe you can help!

Say I buy 10 Steem on an exchange for a market price of $2 each. Thats 10 Steem for $20

Now I put my 10 Steem into my steemit account, and power it all up to Steem Power.

For simplicity, now imagine I don't use steemit at all, no posting, no voting, no commenting.

Time goes by, the market price of Steem is now $3.

I power down my steem power.

What happens here? If I receive Steem, is it still 10 units? If I receive Steem Dollars is it now $30? Or is there another factor that changed that I'm missing. Please help me out by leaving a comment! Thanks :)