I used to think like this. But the older I get the more cynical I become. In massively corrupt environments, everybody needs to appear to be playing the game by the rules when it comes to primary objectives like the distribution of wealth and the financial operations surrounding it. Nobody trusts anyone else and everyone is an adversary of everyone else, even within the leadership ranks. I strongly suspect there would not be any widely known backdoor for oligarchs. A select few oligarchs might have the luck of being tasked with creating such a system, in which case they will build the backdoor for themselves.

Still... I think the speculative scenario is unlikely. I myself am speculating massively here. But what I think is far more likely to happen with respect to crypto is that an international agreement akin to the Bretton Woods System is negotiated that mandates central banks hold a store of value such as Bitcoin. This will provide some foundation of measure for all currencies to be valued against. But the current financial system layer on top will remain intact.

Note, I'm an early Bitcoin hodler and have remained strongly suspicious of Putin's interest in Ethereum with agreements between the foundation and VEB like this one (https://www.coindesk.com/markets/2017/08/31/misunderstanding...), its handling of the DAO event, and Eth2.0's coincidental timing (its delays too) with the Ukraine invasion.

My somewhat speculative paranoia follows, but I strongly suspect Ethereum will NOT play a part in this new system because of the above issues. I think Putin calculated that Ethereum might be a viable alternative to a widespread financial system replacement that could have provided a means of bypassing any sanctions, which is why he went ahead with the Ukraine invasion.

In the end, if this Bretton Woods 2.0 system comes into effect, bitcoin will have failed to become the libertarian financial tool many people hoped it would. But its utility as a store of value can't be ignored and so it will have been co-opted/integrated into the existing financial system. It'll be another example of techno-utopianism naiveté like the 90s style vision of the web.