There have been enough computer scientists and researchers that have looked over Bitcoin's theory and cryptography and code in the past 6 years. If it was a problem they would've said something already :-)
There's nothing to "crack" about the BTC code... again, at the end of the day it all comes down to cracking the cryptographic algorithm which is simply ridiculous. If someone cracked SHA256, it would be a global catastrophe, since endless security is based around SHA256.