That's very clever! And if you Power it up and let it trail your own vote on steemit, she could quickly make 10% gains in STEEM per year from curation rewards + the 2% interest on steem savings. So it will be far better than having the money in the bank even if the price of STEEM remains exactly the same in dollar terms.
An added little bonus is that if you trail your own account's votes, you would also get slightly more curation rewards.