its impossible to break
no way man. the science of cryptography is a never ending battle of attrition. the ring signatures that monero uses will be broken some day. count on it. that doesnt mean we cant have a hell of a party while they hold and make some great use out of them before they are broken

*edit* with the exception of one time pads. those are a priori secure forever.
the only thing that can break ring signatures is quantum computers, those can also break into blockchains like bitcoins so everything is gonna be fucked 20, 30 years from now until its made quantum computer resistant or something