If a guy claim ten years experience, strong, profitable, and robust EA since years but dont have more than 1000 bucks to sustain his strategy, I dont want to invest on it.
There are several reasons a trader don´t wish to put too much money in a strategy. It is not necessarilly because he doesn´t trust in it. I know some traders having better return trading with small equity, others trading high VAR, other low VAR, others in 15m. time frame, others 1 Day time frame, and others haven´t been trading for 10 years and dont have the money, and others have the money but they prefer to pay the mortgage with that...so, don´t assume it is because they don´t trust the strategy. Trading is a mental game, and sometimes any small change can be make a great strategy become a mess. I don´t think an investor want a trader who is having good results make changes on anything and put the outcome at risk. I think the trader has to forget about investors, and trade for himself.
I think a trader have to be serious about trading great, not about money or make happy someone else. Since the moment you focus on money, or you are not comfortable with anything, your results are at risk.
And of course, every investor thinks different way, same every trader do.