I'm just trying to think of ways to adapt bitcoin to the real world outside of exchanges. If I wanted to pay my friend with bitcoin it's cheaper to just give him a wallet vs sending bitcoin from my wallet to his. It could be standardized in amounts like real world money is broken up into dollars and cents and tracked through a different "wallet". It wouldn't have to really affect bitcoin exchanges in any way. And it could possibly get people to use bitcoin as a currency vs something to only be traded on exchanges.

Also can someone ELI5 Segwit to me or point me to a video. I see it everywhere but I don't know what it is and would like to learn.

And to the new reply, new private keys would have to be generated for the wallets in the transaction to prevent that from happening. I just don't know if that would be possible