Thus it seems you are betting that BCX is lying. What caused you to place the odds higher that he is lying than not? It is very suspicious that he won't commit to reveal what he knows later if the exploit hasn't been sold and used by such a date in the future.
I believe he did not exactly mean that there is a serious and fatal exploit that is certainly exploitable and sure to kill the coin. He did not say it, and the world does not work that way. All ecosystems (of which coins are just a tech-heavy example) have vulnerabilities. Some can be infiltrated by force, others by deceit. This is a multi-faceted issue. The admittedly quite clever campaign that used the fake pro-Monero trolls may have influenced BCX's initial reaction.
Now we are already in a point where everyone actually involved wants to move on, and only the consumers of sensation media still want to dig deeper.
On the larger (longer) cycle, has any one figured out how to scale CN's ring signatures to 200 million users? Apple Pay will be there in a year or so. Paypal (cum Bitpay, Coinbase et al centralized crap) is targeting in the unbanked in the developing world (assuming Bangladesh's threat to jail crypto-currency users is an outlier).
It is not easy to say in a person's lifetime if he has left a legacy of tirelessly working for the better world, nor compare 2 people on this ground. I am doing to the best of my ability and you likewise. Our styles are very different though. I am showing a way that people around me can copy and follow, your way is impossible to follow. I don't know anything about tech and propose using imperfect solutions, sometimes just for the sake of feeling empowered by the new thing. You can deem some solutions faulty before they are even implemented. I have made some money by following general investment principles, you don't even care about making money. We are different.