Nobody in the entire world managed to make 10% a day in any way or shape for too many days in a row, they have managed to do it maybe couple times in a row, but nobody did it for too many days in a row.
Even the richest man in the world at one point Warren Buffet who made his fortunes by investing and managed to get worth as much as over 60 billion dollars (don't know how much now) didn't made that type of return, he was making about 20% a year return on average for 50 years in a row.
It means if you want to make money and become rich, no amount is too little but if you want to become one of the richest man alive all you have to do is keep doing it years after years instead of trying to do it quickly in couple months, instead of 10% a day, do 20% a year for 50 years and your children will be richer than anyone in the world.
The best way he would have really made it is to work with 2% in a day, then be compounding it and adding it up to his investment to increase his chance of winning higher when he accumulates his profit, or better still, he should just continue to hold and maybe luck will shine on his trading coin and make it increase by 300% within the month which has already covered all the daily wishes.