No, you don't own it but it is a very simple way to understand why you'd want it as an investment.
As for why would you want that? Ledgers are a fundamental part of how many things work. Blockchain is an evolution of the ledger. It literally makes things faster, cheaper, more secure.
Bitcoin's blockchain will disrupt (evolve) something. The leading use case is a store of value. If that is to be adopted then bitcoin's value will be in the trillions.
As for why would you want that? Ledgers are a fundamental part of how many things work. Blockchain is an evolution of the ledger. It literally makes things faster, cheaper, more secure.
Bitcoin's blockchain will disrupt (evolve) something. The leading use case is a store of value. If that is to be adopted then bitcoin's value will be in the trillions.