10,000 STEEM should yield you between 900 - 1300 extra STEEM/SBD from Booster in a year. You will also receive about 940 STEEM also - for staking your STEEM in SteemPower, so say 10,000 STEEM will yield you about 2000-2200 STEEM in one year.

Of course, we also have days with many customers and high bidders, Jackpot days - and we have days when people are depressed and spend fewer tokens for upvoting, specially in a down trending bear market. I guess nobody want to show anyone their weakness.

But on average from DOLLAR to SteemPower I believe that the price of STEEM is so low now, that your Time to ROI will be significantly shorter and nicer. Remember we have $8 All Time High, and befor that we had a $4.50 All time high - I believe the next All time high can be $15-$30 per STEEM token. Just have to buy in and hodl patiently. And it helps to have Booster liquid income every day.

10,000 SteemPower cost $3309 as I am concluding this reply