I don't think they'll hate Bitcoin when they can make money from it. In the financial game, any asset that can turn a profit is called legal by everyone. Even for banks, they have a lot of money and they have to choose the types of assets to invest in, and Bitcoin is also a digital asset. So why not invest and try to raise its price when they can?
I have the opposite opinion of you. Once large businesses or banks have invested in Bitcoin, they certainly have plans in place to make their portfolios profitable. Especially, Crypto is a decentralized market and they even have more power to do it