Has Bitcoin been cracked?
The Criminal Assets Bureau of Ireland recently successfully cracked a Bitcoin wallet, retrieving 500 BTC, with a total of 6000 BTC later
The private key was printed on an A4 sheet of paper and hidden in a fishing rod case, which was later cleared out by the landlord and lost in the house

The reasons are probably these:
1. Used a problematic pseudo-random number generator
The random number during private key generation was not secure enough, like the Prince Group, so the private key could potentially be deduced

2. The private key was stored in a file with low encryption strength
The private key itself is fine, but it was cracked after accessing the file to obtain the private key

3. He lied, secretly went to look for the private key after coming out and was caught.