This seems very unlikely to me.
1) If any gov't or entity succeeded in owning enough BTC that they controlled it it would kill the value of bitcoin and its appeal would be lost. The financial industry would go into this knowing they'd be losing hundreds of millions of dollars to try to kill BTC. Perhaps that's better than having BTC become a realized threat to their industry. But the issue with that is...
2) There are plenty of other altcoins ready to step up to the plate if BTC becomes unusable. The financial industry would have to go through this same process over and over again every time a cryptocurrency hit $15k or whatever threshold they deem threatening.