Nobody can crack it, this is true. However many people are simply not educated well enough and do not understand the risks with their private keys. As a result of this we see that people lose their private keys or they get compromised, they don't care much if they leave coins on exchanges etc. I just want to point out that there is a big flaw in knowledge with some people and this could turn out to be a bad thing when they lose their money.
That is why we must make bitcoin independent from tracking
Bitcoin was made to be open and transparent, if you are looking for more privacy a like crypto, there are other options out there.