This hacking incidents lower the trust of some people to invest, and try cryptocurrency.
This hackers are really selfish for doing that, cause they're looking for potential buyers out of the million of subscribers to invest and try their project, though this would work for people who has knowledge about crypto, but the effect of it to the community would be long term. Sure, we can say that they manage to achieve their motive to have someone try their coin, but the majority who would think that this crypto community is a dark side would rise. I've heard in twitter that they're mad about the crypto community for hacking their "Idol".
There have been a series of youtube hacks and as the extortion for holding the accounts is less likely as youtube would make a prompt action on complaint, hackers have started indulging into crypto based scam attempt. The surprising thing is how these popular social media have put all the blame to the users and did nothing to stop such hacks from their side.
This problem should be fixed inside add other factors of security so it will not easier for professional hacker to hack someones account .
Hackers always benefiting with this hacks because of posting of fake giveaway or project promotion like what happen to ako si dogies account this one should stop and the one who can do that is the YouTube owner they need upgrade base one people need in security .
But given your suggestion for them to upgrade their security, it will be nonsense as this hackers will always find their way to do these things. They're called hackers for a reason. The best way to defeat these hackers is to capture them, the pictures of them are recorded, then this will resolve the case.