Yeah, I think you need to revisit your calculation.
In 170 days you make 170 *.65 = $110.
How much did in invest?
Instead of buying another drive, I just spent $150 on Burstcoins at $.03. So, 5000 burstcoins. Kinda puts me ahead in the game if it moons

You will get to 5000 coins in 400 days!