didn't you read my argument? you very well know what it means to own percents of an unregulated currency.
the holders can be as good as it gets, but it is still a problem. Just as it is in fiat system. they are humans who can get greedy and form cartel with other investors ,and sell whole junk to central bank for example.
This is not a problem because they bought these bitcoins from people who sold them voluntarily. Blame these guys if you want to blame someone.
Also, manipulating a market is much more difficult than you seem to think, especially when you don't have a printing press. Central banks would need much more than 1% if they wanted to do it.