As a percentage, increasing $30 per dollar per day is a lot. That's three percent a day. It is better to earn at least another hundred dollars on the forum, and then try to increase this amount as a percentage.
There is a golden rule that small amounts need to be increased by arithmetic progression (just adding money by earning fiat, on the forum, etc.), but large amounts - by geometric progression (trading, deposits, and everything that increases the amount multiplied by a percentage). Then it all makes the most sense.
There is a formula by which you can calculate for what period the invested amount will double, if you know at what percentage per annum you want to invest your money, it is called rule 70, you need to divide 70 by a percentage, let's say let it be 5%, in this case your amount will double in 14 years, but you know, in the case of fiat money, inflation will eat up their value. I was once very interested in this topic with compound interest, but it can work in a period when there are no crises and inflation is not high, times are changing and now it is better to find more effective use of your money.