I spent most of my time doing research on many altcoins, their old price to the present value and i find out that even if you sell your tokens today leaving few tokens worth few dollars for many years can worth something. For example if you left 9$ worth of bitcoin in your wallet since 2012 you would never have imagine what it will become today, in jan 2017 you can buy 5000 pieces of Ripple at 0.007$ which costs 35$ and in jan 2018 a XRP cost 3$ which turns 15000$, there are many examples like this on CMC, remember Tron too? My point is its bad selling off all your coins, if you needed money that bad always leave coins and tokens worth of few dollars left in your wallet just in case
You will be suffering frustration if you think this kind calculation. One thing is still same but can't see it, suppose we didn't know that Bitcoin will pump in 2018 even as first cryptocurrency, same we can't find any coin which coin will pump in future. You should keep research and switch coin.
All of course also very much want to make calculations that will produce something very profitable, but it must also be realistic and I agree with colleagues above that calculations like you do will be frustrating. all calculations certainly base an analysis that can be determined when looking at the movement of a coin, when to buy and when it is appropriate to sell with minimal profit or loss.