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

It depends, if you join ICO that needs KYC, then the team project will know your home location along with your Bitcoin address. Not only that, most of Crypto exchanges also need personal details right now. So, its possible to track you from the transaction history.