I have 2.08 BTC. If I bought the three month plan and put the rest of my money into bitstamp, could I turn a profit?
You have $243 in BTC at the current rate
The 3 month plan is $89.96
So you're asking if you could get a 36% profit in 3 months.
I would have to say no.
Also: if you have no expectation of the return on an investment, you shouldn't invest.