I would be careful not to estimate income that is not reasonable, they may consider that fraudulent.
It depends what guidelines they have established for estimating income generated by investments. Do they require you use the average return of the S&P500 over the past 100 years on a 60/40 portfolio? What if you invest in bitcoin? What return would you expect from that (well negative now, but you see what I am saying?)
I have a 143% return this year. I have already made $10,000 this week alone trading just $65,000 in stock. Is that reasonable? What should I put down as my expected return in 2019?