I want to show a simple calculation for the monthly ROI and annual ROI
for staking 100 000 TRX in tronscan.org
Price/TRX = $0.0266 ( as of today 15th April from CMC ). Lets assume that this price is fixed for this example.
Daily TRX that you will get for voting for TRON block producers is about 25 (estimate)
Investment for 100 000 TRX : $0.0266 x 100 000 = $ 2660
Monthly income from staking TRX : 25 TRX/day x 30 days x $ 0.0266 = $ 19.95 ( about $ 20)
Monthly % ROI : (20 / 2660) x 100% =0.75%
APR (annual percentage of return) = 0.75 % x 12 = 9 %
To my knowledge 9% return is far better than what some banks are offering. Moreover holding Tron also makes you
eligible for Bittorrent monthly airdrop which is 0.11% .
Hence you will gain in two ways : 9% ROI + BTT airdrop.
Disclaimer : I am not a investment expert. The opinion and example expressed above is from my own experience and not to be taken as financial advice.