start with 100 euros and you would trade every day in a coin and you make every time for 40% profit on all your bet then it is still possible that you have more than 2 million euros in 30 days??
You are just using calculations, you already answered to your question in there.
And no, it is not possible, you have forgot that you need to be 24 hours on your computer checking the prices once and once again.
It is not easy, you need to setup everything, and if you do not know in where to find the sources, you are not going to be able to make a single buck.
And remember the fees, they are pretty high right now, indirectly from which altcoin you are using.