Hey Dooglus,
I've been an investor since late June and don't change the amount I have invested that much. One thing that bothers me is that other people to a certain extent control the % I own of the bankroll. (by them making withdrawals and investments)
I was thinking of a feature you could maybe implement, where I make an investment of lets say 100 BTC, keep another 100 BTC as a balance and check a box where it says I would like to keep the % I own of the bankroll as constant as possible (let's say 0.25%), investing automatically the BTC from my balance when this percentage goes down and divesting when it goes up.
This would give me a more constant exposure to the wins and losses and reduce the luck aspect we now see in investing. Another benefit is that the max profit would stay more constant than now.