I am with Robert Kiyosaki, Bitcoin is totally different in having its ETF, the essence of being decentralized on Bitcoin is likely becoming useless, and it can cause manipulation, especially in price.
But we really can't avoid it, it's already here, just like what happened to Gold, where some people wanted ETF on Bitcoin because they believed that price could follow the Gold after ETF.
Bitcoin is different than Gold. Bitcoin with blockchain technology and its design allows us to have private keys that give us control of our bitcoin.
If we buy shares of Bitcoin Spot ETFs, we don't own private keys that means we don't actually own bitcoin. We spend money but must believe that these Bitcoin Spot ETF companies and their partners play as custodians like Coinbase will run their business transparently and safely, care about their business survival and do care about customers.
We don't know what they do, what will happen with them that all affect our money. Believe is only believe so investors with their own money, need to make choice that should be smart one.