I know what you feel when these big companies and institutions are continuously hoarding Bitcoins.
Unfortunately as an ordinary people, there is nothing we can do about it but to ride the waves. Sell when it is on the top or when it reached your target selling price.

Being decentralized, Bitcoin can be bought by any huge companies if they want to and at the same time sell if they want too. This might be a good news for everyone since they are seeing large institutions coming in into crypto but in the long run this might cause price manipulation towards Bitcoin and the crypto in general.