It is obvious that world billionaires are indicating interest into bitcoin of late ,for instance Elon Musk twitted that you can now purchase his Tesla cars with bitcoin, is he trying to hod bitcoins so it will be scarce then he control and dictate the price of the market or is it for the good of bitcoin that we have been expecting ,what do you think
I mean yeah you could probably manipulate the market if you could buy a big percentage of bitcoin like for example up to 40% of all of the bitcoin, I mean if you can but not totally a full control of it.
At the position of bitcoin, these days a lot of whales are holding bitcoin unless all of the whales are gonna do the same they could surely manipulate the market but manipulate by 1 company or people would just cost or would be too much.
When it comes to bitcoin technology I've read some that there are high reward or bounty on hacking the bitcoin technology but still until now it is still unhackable, I mean we surely expect a lot of people and companies are trying.