Owning berkshire means owning a slice of a huge conglomerate of profitable, growing businesses. Owning bitcoin means owning an electronic numerical value that's guaranteed by the network.
Berkshire is a productive asset, bitcoin is effectively an e-commodity. There is virtually no intrinsic value in bitcoin (it doesn't generate massive amounts of value for society). Owning berkshire for long periods of time is investing (long-term profit and value growth), while owning bitcoin for long periods of time is speculating (believing the next sucker will buy a non-productive asset at a higher price than you).
Owning BTC means owning part of a system that can replace 50% Of what all banks do at least. Conservatively that is worth 500M~to 1T a year.
Think of the costs involved in securing the back end of the banks, banking branches, etc.
Then there is the cash side, the whole cash printing handling side of things is replaced by BTC that cost trillions a year to deal with.
This no intrinsic value is so often repeated but never actually thought about.
The number of IT consultant, systems, property, branches and all the costs and maintiance each year are huge.