I noticed that even new coins that are simply created like on BNB, without even a small thought behind it, gets millions of volumes per day trading.
Is their something behind this volume? I mean is it this something technical or really happening.
Those are huge amount of money.
If people have so much money, than I think I should consider also to put a new coin on the market

This is the reason why there is more volume in these coins now is because new investors are now in the space, unlike before, projects finds it difficult to raise a good amount of dollars in their presale, there were scarce investors and at the same time they never list them on exchange so investors hope lost if the participate in the same.
Now, every projects teams makes sure they deliver the coin to be listed on the market, that's why the volume keeps increasing, I have understood that the cryptocurrencies coins are very easy to create and that you can make instant money from it if successfully done.