My questions is not on the technical side, since obviously you can create an address in a very much anonymous way. However, when it comes to spending it or convert it into fiat or even when spending it on a legit shop online you have to leave an identity trace.
I know that with small transactions is fine, under the radar basically, but what happens with significant ammounts?
I am asking this because I intend to become rich in 4 or 5 weeks

I think bitcoin is not anonymous at all. Because almost all of the people all over the world knows bitcoin now. Bitcoin was so popular nowadays so its not anonymous anymore and no suprise. Bitcoin was all over the world we must study more about bitcoin so can understand it