You might be pointing out on hackers planning to attack exchanges and other platforms that are holding bitcoins. This attacks really make bitcoin and cryptocurrency less secured as of now. This is a long-time issues that still need to be resolved.
Of course that is an issue and always will be. Hackers are attracted to everything that brings them money, so cryptocurrencies are target too. But governments don't have anything to do with that. I.guess some people just can't live without conspiracy theories and every time when the price drop is either whales or governments to blame.