I imagine if there are many Bitcoin holding companies I think it is very dangerous, because price manipulation might happen easily,
to be honest I think this, I prefer if Bitcoin is held in the staking feature,
if Bitcoin has a feature like this it will be even more very nice.
It is not dangerous if many companies would start holding bitcoin. Don't you worry about manipulation or monopolizing. What's more worrying is the controlled percentage of mining power for a specific country or area. Staking can be done through companies with their
interest offers.
You deposit on their exchange and receive percentage given the annual rate for their btc deposits. But I'm not advising you to do that because if you don't hold your PKeys, not your bitcoin.
Even if many companies start holding bitcoin, it doesn't mean that the companies can manipulate or monopolize the market because they need to against all people in the crypto market. I think the exchanges themselves don't want to see what happens, and they will prevent that happen to the crypto market. But if many companies start to buy bitcoin, that can give bitcoin a chance to be known by the people or the employee of that company, so they can start to have bitcoin and use bitcoin as an investment.